mh update: breqn v0.97a, flexisym v0.96, mathstyle v0.84 (27dec07)

git-svn-id: svn://tug.org/texlive/trunk@5960 c570f23f-e606-0410-a88d-b1316a301751

22 files changed, 828 insertions, 1657 deletions

diff --git a/Master/texmf-dist/doc/latex/mh/README b/Master/texmf-dist/doc/latex/mh/README
index d41d1ccb3db..f4cde904cc5 100644
--- a/Master/texmf-dist/doc/latex/mh/README
+++ b/Master/texmf-dist/doc/latex/mh/README
@@ -13,14 +13,15 @@ The files in the mh bundle are listed are
     empheq.dtx
     empheq07.dtx
     eqlayouts.tex
-    eqbreaks.pdf
+    breqn-technotes.tex
 and derived files. The derived files of each .dtx-file are listed
 at the top of the respective .dtx-file.
 
 
 INSTALLATION
 ============
-See the .dtx-files for details.
+Running TeX on each dtx file extracts the runtime files. See the dtx
+files for details.
 
 DESCRIPTION
 ===========
@@ -101,4 +102,4 @@ probably be an integral part of LaTeX3.
 
 
 ===========
-This README file was last revised 2007/12/10.
+This README file was last revised 2007/12/19.
diff --git a/Master/texmf-dist/doc/latex/mh/breqn-technotes.pdf b/Master/texmf-dist/doc/latex/mh/breqn-technotes.pdf
new file mode 100644
index 00000000000..63a388d1353
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mh/breqn-technotes.pdf
diff --git a/Master/texmf-dist/doc/latex/mh/breqn-technotes.tex b/Master/texmf-dist/doc/latex/mh/breqn-technotes.tex
new file mode 100644
index 00000000000..e8c6174cbbf
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mh/breqn-technotes.tex
@@ -0,0 +1,145 @@
+\documentclass{article}
+\usepackage{lmodern}
+\usepackage[T1]{fontenc}
+\usepackage{breqn}
+\def\eqnumside{L}
+\providecommand*\cs[1]{\texttt{\textbackslash#1}}
+
+\usepackage{hyperref}
+
+\title{Technical notes on equation breaking}
+\author{Michael J.\ Downes \and Morten H\o gholm}
+\begin{document}
+
+\maketitle
+
+
+\section{Tag placement}
+
+The method used by the breqn package to place the equation number is
+rather more complicated than you might think, and the whole reason is
+to allow the number to stay properly centered on the total height even
+when the height fluctuates due to stretching or shrinking of the page.
+
+
+Consider the following equation: 
+\begin{dmath}[number={3.15}]
+  N_{0} \simeq \left( \frac{\nu}{\lVert u\rVert_{H^{i}}} \right) 
+  \lvert I\rvert^{-1/2}
+\end{dmath}
+It will have only one line, if the column width is not too narrow. 
+
+Scrutinizing the vertical list will shed light on some of the basic properties 
+shared by all breqn equations. After that we will look at what would happen if 
+two or more lines were needed. The numbers added on the left in the following 
+\cs{showlists} output mark the points of interest. 
+\begin{verbatim}
+[1] \penalty 10000 
+    \glue(\abovedisplayskip) 0.0 
+    \penalty 10000 
+    \glue(\belowdisplayskip) 0.0 
+[2] \glue 4.0 plus 4.0 
+    \glue(\lineskip) 1.0 
+[3] \vbox(16.53902+0.0)x0.0, glue set 16.53902fil 
+    .\glue 0.0 plus 1.0fil minus 1.0fil 
+    \penalty 10000 
+[4] \glue -8.51945 
+[5] \hbox(7.5+2.5)x25.55563 
+    .\OT1/cmr/m/n/10 ( 
+    .\OT1/cmr/m/n/10 3 
+    .\OT1/cmr/m/n/10 . 
+    .\OT1/cmr/m/n/10 1 
+    .\OT1/cmr/m/n/10 5 
+    .\kern 0.0 
+    .\OT1/cmr/m/n/10 ) 
+    \penalty 10000 
+[6] \glue(\parskip) -18.01956 
+[7] \hbox(16.53902+9.50012)x360.0, glue set 1.78647 
+\end{verbatim}
+\begin{enumerate}
+\item These four lines are a hidden display structure from \TeX's
+  primitive \texttt{\$\$} mechanism. It is used only to get the value
+  of \cs{predisplaysize} so that we can later calculate by hand
+  whether to use the short display skips or the regular ones. (The
+  reason that we have to do it by hand traces back to the fact that
+  \TeX\ 3.x does not allow unhboxing in math mode.) The penalties come
+  from \cs{predisplaypenalty} and \cs{postdisplaypenalty}, which were
+  locally set to 10000 to ensure there would be no unintended page
+  breaks at these glue nodes.
+
+\item These two glue nodes are the ones that would normally have been
+  produced at the top of a display; the first one is the above-display
+  skip node (though we had to put it in by hand with \cs{vskip}) and
+  the second one is the usual baselineskip/lineskip node.
+
+\item This is a dummy copy of the equation's first line, which is
+  thrown in here to get the proper value of baselineskip (or lineskip
+  in this case). Why do we need this? Because this ensures that we get
+  the top spacing right before we fiddle with the glue nodes
+  surrounding the equation number. And if the equation has a frame,
+  this box is a good place to add it from.
+
+\item This is a special glue node that brings us to the right vertical
+  position for adding the equation number. Its value is calculated
+  from the variables that you would expect, given the presence of the
+  dummy first line above the num- ber: starting position of the
+  equation, height of first line, total height of equation body. If
+  the equation body had more than one line, with stretchable glue
+  between the lines, half of the stretch would be added in this glue
+  node.
+
+\item The hbox containing the equation number.
+
+\item Backspace to bring the equation body to the right starting point. We use 
+  \cs{parskip} to put this glue in place because we're going to get a
+  parskip node here in any case when we add the equation body with (in
+  essence). If we didn't do this we'd get two glue nodes instead of
+  one, to no purpose.
+
+\cs{\noindent} \cs{unhbox}\cs{EQ@box}.
+
+
+\item And lastly we see here the first line of the equation body,
+  which appears to have height 16.5pt and depth 9.5pt.
+\end{enumerate}
+
+For comparison, the vertical list produced from the above equation in
+standard \LaTeX\ would look like this, if the same values of
+columnwidth and abovedisplayskip are used:
+\begin{verbatim}
+[1] \penalty 10000 
+[2] \glue(\abovedisplayskip) 4.0 plus 4.0 
+    \glue(\lineskip) 1.0 
+    \hbox(16.53902+9.50012)x232.94844 
+[3] .\hbox(7.5+2.5)x25.55563 
+    ..\hbox(7.5+2.5)x25.55563 
+    ...\OT1/cmr/m/n/10 ( 
+    ...\OT1/cmr/m/n/10 3 
+    ...\OT1/cmr/m/n/10 . 
+    ...\OT1/cmr/m/n/10 1 
+    ...\OT1/cmr/m/n/10 5 
+    ...\kern 0.0 
+    ...\OT1/cmr/m/n/10 ) 
+    .\kern101.49591 
+[4] .\hbox(16.53902+9.50012)x105.8969 
+    ... 
+[5] \penalty 0 
+[6] \glue(\belowdisplayskip) 4.0 plus 4.0 
+    \glue(\lineskip) 1.0 
+    \hbox(6.94444+1.94444)x345.0, glue set 62.1106fil
+\end{verbatim}
+
+\begin{enumerate}
+  \item \cs{predisplaypenalty}
+  \item \cs{abovedisplayskip} 
+  \item  equation number box
+  \item equation body 
+  \item \cs{postdisplaypenaltly}  
+  \item \cs{belowdisplayskip}
+\end{enumerate}
+
+
+
+
+
+\end{document}
\ No newline at end of file
diff --git a/Master/texmf-dist/doc/latex/mh/breqn.pdf b/Master/texmf-dist/doc/latex/mh/breqn.pdf
index 120e081c698..e94a3618a6f 100644
--- a/Master/texmf-dist/doc/latex/mh/breqn.pdf
+++ b/Master/texmf-dist/doc/latex/mh/breqn.pdf
diff --git a/Master/texmf-dist/doc/latex/mh/cmbase.sym b/Master/texmf-dist/doc/latex/mh/cmbase.sym
index 151aac3c742..7a468eea799 100644
--- a/Master/texmf-dist/doc/latex/mh/cmbase.sym
+++ b/Master/texmf-dist/doc/latex/mh/cmbase.sym
@@ -28,7 +28,7 @@
 %%    flexisym.sty, flexisym.pdf, flexisym.ins, flexisym.drv,
 %%    cmbase.sym, mathpazo.sym, mathptmx.sym, msabm.sym.
 %% 
-\ProvidesSymbols{cmbase}[2001/09/07 v0.91]
+\ProvidesSymbols{cmbase}[2007/12/19 v0.92]
 \@xp\xdef\csname mg@OT1\endcsname{\hexnumber@\symoperators}
 \@xp\xdef\csname mg@OML\endcsname{\hexnumber@\symletters}
 \@xp\xdef\csname mg@OMS\endcsname{\hexnumber@\symsymbols}
@@ -332,7 +332,8 @@
 \DeclareFlexCompoundSymbol{\neq}{Rel}{\not{=}}
 \DeclareFlexCompoundSymbol{\mapsto}{Rel}{\mapstoOrd\rightarrow}
 \DeclareFlexCompoundSymbol{\cong}{Rel}{\mathpalette\@vereq\sim}
-\newcommand*\joinord{\mkern-3mu }
+\providecommand*\joinord{}
+\renewcommand*\joinord{\mkern-3mu }
 \DeclareFlexCompoundSymbol{\notin}{Rel}{\mathpalette\c@ncel\in}
 \DeclareFlexCompoundSymbol{\rightleftharpoons}{Rel}{\mathpalette\rlh@{}}
 \DeclareFlexCompoundSymbol{\doteq}{Rel}{\buildrel\textstyle.\over=}
diff --git a/Master/texmf-dist/doc/latex/mh/eqbreaks.pdf b/Master/texmf-dist/doc/latex/mh/eqbreaks.pdf
deleted file mode 100644
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diff --git a/Master/texmf-dist/doc/latex/mh/eqlayouts.pdf b/Master/texmf-dist/doc/latex/mh/eqlayouts.pdf
index 3104a4b6fc0..da279b9f9a2 100644
--- a/Master/texmf-dist/doc/latex/mh/eqlayouts.pdf
+++ b/Master/texmf-dist/doc/latex/mh/eqlayouts.pdf
diff --git a/Master/texmf-dist/doc/latex/mh/flexisym.pdf b/Master/texmf-dist/doc/latex/mh/flexisym.pdf
index bfd83b1eb99..f9ef80072fd 100644
--- a/Master/texmf-dist/doc/latex/mh/flexisym.pdf
+++ b/Master/texmf-dist/doc/latex/mh/flexisym.pdf
diff --git a/Master/texmf-dist/doc/latex/mh/mathpazo.sym b/Master/texmf-dist/doc/latex/mh/mathpazo.sym
index ceaad938a6a..b8606facefb 100644
--- a/Master/texmf-dist/doc/latex/mh/mathpazo.sym
+++ b/Master/texmf-dist/doc/latex/mh/mathpazo.sym
@@ -28,7 +28,7 @@
 %%    flexisym.sty, flexisym.pdf, flexisym.ins, flexisym.drv,
 %%    cmbase.sym, mathpazo.sym, mathptmx.sym, msabm.sym.
 %% 
-\ProvidesSymbols{mathpazo}[2007/12/09 v0.1]
+\ProvidesSymbols{mathpazo}[2007/12/19 v0.2]
 \@xp\xdef\csname mg@OT1\endcsname{\hexnumber@\symoperators}
 \@xp\xdef\csname mg@OML\endcsname{\hexnumber@\symletters}
 \@xp\xdef\csname mg@OMS\endcsname{\hexnumber@\symsymbols}
@@ -332,7 +332,8 @@
 \DeclareFlexCompoundSymbol{\neq}{Rel}{\not{=}}
 \DeclareFlexCompoundSymbol{\mapsto}{Rel}{\mapstoOrd\rightarrow}
 \DeclareFlexCompoundSymbol{\cong}{Rel}{\mathpalette\@vereq\sim}
-\newcommand*\joinord{\mkern-3.45mu }
+\providecommand*\joinord{}
+\renewcommand*\joinord{\mkern-3.45mu }
 \DeclareFlexCompoundSymbol{\notin}{Rel}{\mathpalette\c@ncel\in}
 \DeclareFlexCompoundSymbol{\rightleftharpoons}{Rel}{\mathpalette\rlh@{}}
 \DeclareFlexCompoundSymbol{\doteq}{Rel}{\buildrel\textstyle.\over=}
diff --git a/Master/texmf-dist/doc/latex/mh/mathptmx.sym b/Master/texmf-dist/doc/latex/mh/mathptmx.sym
index c612cfc516f..2308bc3b770 100644
--- a/Master/texmf-dist/doc/latex/mh/mathptmx.sym
+++ b/Master/texmf-dist/doc/latex/mh/mathptmx.sym
@@ -28,7 +28,7 @@
 %%    flexisym.sty, flexisym.pdf, flexisym.ins, flexisym.drv,
 %%    cmbase.sym, mathpazo.sym, mathptmx.sym, msabm.sym.
 %% 
-\ProvidesSymbols{mathptmx}[2007/12/09 v0.1]
+\ProvidesSymbols{mathptmx}[2007/12/19 v0.2]
 \@xp\xdef\csname mg@OT1\endcsname{\hexnumber@\symoperators}
 \@xp\xdef\csname mg@OML\endcsname{\hexnumber@\symletters}
 \@xp\xdef\csname mg@OMS\endcsname{\hexnumber@\symsymbols}
@@ -332,7 +332,8 @@
 \DeclareFlexCompoundSymbol{\neq}{Rel}{\not{=}}
 \DeclareFlexCompoundSymbol{\mapsto}{Rel}{\mapstoOrd\rightarrow}
 \DeclareFlexCompoundSymbol{\cong}{Rel}{\mathpalette\@vereq\sim}
-\newcommand*\joinord{\mkern-3mu }
+\providecommand*\joinord{}
+\renewcommand*\joinord{\mkern-3mu }
 \DeclareFlexCompoundSymbol{\notin}{Rel}{\mathpalette\c@ncel\in}
 \DeclareFlexCompoundSymbol{\rightleftharpoons}{Rel}{\mathpalette\rlh@{}}
 \DeclareFlexCompoundSymbol{\doteq}{Rel}{\buildrel\textstyle.\over=}
diff --git a/Master/texmf-dist/doc/latex/mh/mathstyle.pdf b/Master/texmf-dist/doc/latex/mh/mathstyle.pdf
index ae2163e3ea1..92071d6cd6e 100644
--- a/Master/texmf-dist/doc/latex/mh/mathstyle.pdf
+++ b/Master/texmf-dist/doc/latex/mh/mathstyle.pdf
diff --git a/Master/texmf-dist/source/latex/mh/breqn.dtx b/Master/texmf-dist/source/latex/mh/breqn.dtx
index 81d0fc39d7a..0f01201b370 100644
--- a/Master/texmf-dist/source/latex/mh/breqn.dtx
+++ b/Master/texmf-dist/source/latex/mh/breqn.dtx
@@ -67,7 +67,7 @@
 \input docstrip.tex
 \Msg{************************************************************************}
 \Msg{* Installation}
-\Msg{* Package: breqn 2007/12/10 v0.96 Breqn (MH)}
+\Msg{* Package: breqn 2007/12/22 v0.97a Breqn (MH)}
 \Msg{************************************************************************}
 
 \keepsilent
@@ -128,10 +128,12 @@ and the derived files
 %<*driver>
 \NeedsTeXFormat{LaTeX2e}
 \ProvidesFile{breqn.drv}%
-  [2007/12/10 v0.96 breqn (MH)]
+  [2007/12/22 v0.97a breqn (MH)]
 \documentclass{ltxdoc}
-
-\usepackage{color,verbatim,xspace,varioref,listings}
+\CodelineIndex
+\EnableCrossrefs
+\setcounter{IndexColumns}{2}
+\usepackage{color,verbatim,xspace,varioref,listings,amsmath,trace}
 
 \definecolor{hilite}{rgb}{0.2,0.4,0.7}
 \def\theCodelineNo{\textcolor{hilite}{\sffamily\tiny\arabic{CodelineNo}}}
@@ -228,7 +230,7 @@ and the derived files
 % \fi
 %
 % \title{The \pkg{breqn} package}
-% \date{2007/12/10 v0.96}
+% \date{2007/12/22 v0.97a}
 % \author{Morten H\o gholm \\\texttt{mh.ctan@gmail.com}}
 %
 % \maketitle
@@ -417,7 +419,7 @@ and the derived files
 % \LaTeX\ interface for defining math symbols (\cs{DeclareMathSymbol}),
 % things should work OK most of the time. Any more complex math symbol
 % setup is quite likely to quarrel with the \pkg{flexisym} package.
-% See Section~\ref{flexisym} for further information.
+% See Section~\vref{flexisym} for further information.
 %
 % \subsection{Subscripts and superscripts}
 %
@@ -502,13 +504,16 @@ and the derived files
 % \setkeys{breqn}{breakdepth={1}}
 % \end{verbatim}
 %
-% See the discussion of environment options, Section~\ref{envopts}, for
+% See the discussion of environment options, Section~\vref{envopts}, for
 % more information.
 %
-% One package option that may be of interest to \TeX nicians is the
-% \opt{debug} option; this activates some debugging statements embedded in
-% the code of the alpha release which trace measuring activities related
-% to line breaking.
+% Debugging information is no longer available as a package
+% option. Instead, the tracing information has been added in a fashion
+% so that it can be enabled as a docstrip option:
+% \begin{verbatim}
+% \generate{\file{breqn.sty}{\from{breqn.dtx}{package,trace}}}
+% \end{verbatim}
+% 
 %
 % \section{Environments and commands}
 % \subsection{Environments}
@@ -1000,7 +1005,7 @@ and the derived files
 % 
 % Declare package name and date.   
 %    \begin{macrocode}
-\ProvidesPackage{breqn}[2007/12/10 v0.96]
+\ProvidesPackage{breqn}[2007/12/22 v0.97a]
 %    \end{macrocode}
 %
 %
@@ -1009,17 +1014,14 @@ and the derived files
 % Most options are set with the \cs{options} command (which
 % calls \cs{setkeys}) because the standard package option
 % mechanism doesn't provide support for key-value syntax.   
-% Cf \fn{breqndoc.tex}.   
 % 
-% It seems easier to turn off debugging than turn it on so the
-% implementation of the \opt{debug} option is sort of backward.   
+% First we need to get the catcodes sorted out.
 %    \begin{macrocode}
 \edef\breqnpopcats{%
   \catcode\number`\"=\number\catcode`\"
   \relax}
 \AtEndOfPackage{\breqnpopcats}%
 \catcode`\^=7 \catcode`\_=8 \catcode`\"=12 \relax
-\DeclareOption{debug}{\errorcontextlines=2000\relax}
 \DeclareOption{mathstyleoff}{%
   \PassOptionsToPackage{mathstyleoff}{flexisym}%
 }
@@ -1044,7 +1046,7 @@ and the derived files
 % I don't think so.   
 %    \begin{macrocode}
 \@ifpackageloaded{flexisym}{}{%
-  \RequirePackage[cmbase]{flexisym}[2007/12/10]
+  \RequirePackage{flexisym}[2007/12/19]
     \edef\breqnpopcats{\breqnpopcats
     \catcode\number`\^=\number\catcode`\^
     \catcode\number`\_=\number\catcode`\_
@@ -1402,7 +1404,7 @@ and the derived files
 % 1999.   
 % The extra application of \cs{number} is needed for maximal
 % robustness in case the repeat count N is given in some weird \tex  form
-% such as \verb""E9" or \verb"\count9".   
+% such as \verb|"E9| or \verb|\count9|.   
 %    \begin{macrocode}
 % usage: \message{H\replicate{5}{i h}ow de doo dee!}
 \begingroup \catcode`\&=11
@@ -1569,25 +1571,15 @@ and the derived files
 % 
 % \section{Debugging}
 % Debugging help.   
-% 
-% \begin{macro}{\debug}
 %    \begin{macrocode}
-\let\debug=\begingroup
+%<*trace>
+\errorcontextlines=2000\relax
 %    \end{macrocode}
-% \end{macro}
 % 
-% \begin{macro}{\gubed}
-%    \begin{macrocode}
-\let\gubed=\endgroup
-%    \end{macrocode}
-% \end{macro}
-% 
-% \begin{macro}{\debugmsg}
+% \begin{macro}{\breqn@debugmsg}
 % Print a debugging message.   
 %    \begin{macrocode}
-\def\debugmsg{\message{||= \iffalse}\fi
-  \@xp\@gobble\string
-}
+\long\def\breqn@debugmsg#1{\GenericInfo{||}{||=\space#1}}
 %    \end{macrocode}
 % \end{macro}
 % 
@@ -1630,23 +1622,17 @@ and the derived files
 %    \begin{macrocode}
 \def\debug@para{%
   \debugwr{\hsize\the\hsize, \parfillskip\the\parfillskip}%
-  \debugmsg{\leftskip\the\leftskip, \rightskip\the\rightskip}%
-  \debugmsg{\linepenalty\the\linepenalty, \adjdemerits\the\adjdemerits}%
-  \debugmsg{\pretolerance\the\pretolerance, \tolerance\the\tolerance,
+  \breqn@debugmsg{\leftskip\the\leftskip, \rightskip\the\rightskip}%
+  \breqn@debugmsg{\linepenalty\the\linepenalty, \adjdemerits\the\adjdemerits}%
+  \breqn@debugmsg{\pretolerance\the\pretolerance, \tolerance\the\tolerance,
     \parindent\the\parindent}%
 }
 %    \end{macrocode}
 % \end{macro}
 % 
 % 
-% Turn off debugging unless it was asked for.   
 %    \begin{macrocode}
-\@ifpackagewith{breqn}{debug}{}{%
-  \let\debug\relax \let\gubed\relax
-  \let\debugmsg\@gobble \let\debug@lines\relax \let\debug@para\relax
-  \let\debugwr\@gobble
-  \let\debug@box\@gobble \let\debug@push\@gobbletwo
-}
+%</trace>
 %    \end{macrocode}
 % 
 % 
@@ -2348,6 +2334,20 @@ and the derived files
 \define@key{breqn}{style}{\eqstyle\@xp{\the\eqstyle #1}}
 %    \end{macrocode}
 % \begin{literalcode}
+% \begin{dmath}[shortskiplimit={1em}]
+% \end{literalcode}
+% If the line immediately preceeding a display has length $l$, the
+% first line of the display is indented $i$, and a shortskip limit $s$
+% is set, then the spacing above the display is equal to
+% \cs{abovedisplayshortskip} if $l+s < i $ and \cs{abovedisplayskip}
+% otherwise. The default shortskip limit is 2\,em which is what \TeX\
+% hardcodes but this parameter overrides that.
+%    \begin{macrocode}
+\define@key{breqn}{shortskiplimit}{\def\eq@shortskiplimit{#1}}
+\def\eq@shortskiplimit{2em}
+%    \end{macrocode}
+%
+% \begin{literalcode}
 % \begin{dmath}[frame]
 % \end{literalcode}
 % The \opt{frame} option merely puts a framebox around the body
@@ -2449,7 +2449,7 @@ and the derived files
   \darray@mkpream#1\@percentchar
 }
 %    \end{macrocode}
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
 % FORMAT STATUS%
 % \begin{verbatim}
 % \def\eq@frame{T}%
@@ -2474,12 +2474,12 @@ and the derived files
 % IRB
 %  \def\eqindent{I}\def\eqnumside{R}\def\eqnumplace{B}\mathindent10\p@
 % \end{verbatim}
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
 % The main environments.
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%BRM: The following incorporates several changes:
-%%  1) modifications supplied by MJD to fix the eaten \cs{paragraph} problem.
-%%  2) Added \cs{display@setup} here, rather than globally.
+%
+%BRM: The following incorporates several changes:
+%  1) modifications supplied by MJD to fix the eaten \cs{paragraph} problem.
+%  2) Added \cs{display@setup} here, rather than globally.
 % 
 % \begin{macro}{\dmath}
 % \begin{macro}{\enddmath}
@@ -2491,7 +2491,7 @@ and the derived files
 \newenvironment{dmath}{%
  \let\eq@hasNumber\@True \@optarg\@dmath{}}{}
 \def\@dmath[#1]{%
-  \debugmsg{=== DMATH ==================================================}%
+%<trace>  \breqn@debugmsg{=== DMATH ==================================================}%
   \everydisplay\expandafter{\the\everydisplay \display@setup}%
   \if@noskipsec \leavevmode \fi
   \if@inlabel \leavevmode \global\@inlabelfalse \fi
@@ -2655,7 +2655,7 @@ and the derived files
 % either an \cs{itshape} (recommended) or a \cs{textit}
 % value.   
 %    \begin{macrocode}
-      \debugmsg{Number \eq@number}%
+%<trace>      \breqn@debugmsg{Number \eq@number}%
       \set@label{equation}\eq@number
       \global\sbox\EQ@numbox{%
         \next@label \global\let\next@label\@empty
@@ -2680,25 +2680,66 @@ and the derived files
 % having worked out the best parshape.
 % BRM: This portion is extensively refactored to get common operations
 % together (so corrections get consistently applied).
+%
+% MH: I've destroyed Bruce's nice refactoring a bit to get the
+% abovedisplayskips correct for both groups of equations and single
+% \env{dmath} environments.  I will have to redo that later.
 %    \begin{macrocode}
+\newcount\eq@final@linecount
+\let\eq@GRP@first@dmath\@True
 \def\eq@finish{%
   \begingroup
-    \debugmsg{Formatting equation}%
-    \debug@showmeasurements
+%<trace>    \breqn@debugmsg{Formatting equation}%
+%<trace>    \debug@showmeasurements
     \if F\eq@frame\else
       \freeze@glue\eqlinespacing \freeze@glue\eqlineskip
     \fi
 %    \eq@topspace{\vskip\parskip}% Set top spacing
     \csname eq@\eqindent @setsides\endcsname % Compute \leftskip,\rightskip
     \adjust@parshape\eq@parshape% Final adjustment of parshape for left|right skips
-    \eq@topspace{\vskip\parskip}% Set top spacing
-    \debug@showformat
-    % Now, invoke the appropriate typesetter according to number placement
+%    \end{macrocode}
+% If we are in an a group of equations we don't want to calculate the
+% top space for the first one as that will be delayed until later when
+% the space for the group is calculated. However, we do need to store
+% the leftskip used here as that will be used later on for calculating
+% the top space.
+%    \begin{macrocode}
+    \if\eq@group
+      \if\eq@GRP@first@dmath
+        \global\let\eq@GRP@first@dmath\@False
+        \xdef\dmath@first@leftskip{\leftskip=\the\leftskip\relax}%
+%<trace> \breqn@debugmsg{Stored\space\dmath@first@leftskip}
+      \else
+        \eq@topspace{\vskip\parskip}% Set top spacing
+      \fi
+    \else
+      \eq@topspace{\vskip\parskip}% Set top spacing
+    \fi
+%<trace>    \debug@showformat
+%    \end{macrocode}
+% We now know the final line count of the display. If it is a
+% single-line display, we want to know as that greatly simplifies the
+% equation tag placement (until such a time where this algorithm has
+% been straightened out).
+%    \begin{macrocode}
+    \afterassignment\remove@to@nnil
+    \eq@final@linecount=\expandafter\@gobble\eq@parshape\@nnil
+%    \end{macrocode}
+% Now, invoke the appropriate typesetter according to number placement
+%    \begin{macrocode}
     \if\eq@hasNumber
       \if\eq@shiftnumber
         \csname eq@typeset@\eqnumside Shifted\endcsname
       \else
-        \csname eq@typeset@\eqnumside\eqnumplace\endcsname
+%    \end{macrocode}
+% If there is only one line and the tag doesn't have to be shifted, we
+% call a special procedure to put the tag correctly.
+%    \begin{macrocode}
+        \ifnum\eq@final@linecount=\@ne
+          \csname eq@typeset@\eqnumside @single\endcsname
+        \else
+          \csname eq@typeset@\eqnumside\eqnumplace\endcsname
+        \fi
       \fi
     \else
       \eq@typeset@Unnumbered
@@ -2706,11 +2747,42 @@ and the derived files
   \endgroup
   \eq@botspace
 }
-%    \end{macrocode}
-% 
+%    \end{macrocode} 
 % \end{macro}
 % 
 % 
+% These are temporary until the tag position algorithm gets
+% rewritten. At least the tag is positioned correctly for single-line
+% displays. The horizontal frame position is not correct but the
+% problem lies elsewhere.
+%    \begin{macrocode}
+\def\eq@typeset@L@single{%
+  \nobreak
+  \eq@params\eq@parshape
+  \nointerlineskip\noindent 
+  \add@grp@label
+  \rlap{\kern-\leftskip\box\EQ@numbox}%
+  \if F\eq@frame
+  \else
+    \rlap{\raise\eq@firstht\hbox to\z@{\eq@addframe\hss}}%
+  \fi
+  \eq@dump@box\unhbox\EQ@box \@@par
+}
+\def\eq@typeset@R@single{%
+  \nobreak
+  \eq@params\eq@parshape
+  \nointerlineskip\noindent 
+  \add@grp@label
+  \if F\eq@frame
+  \else
+    \rlap{\raise\eq@firstht\hbox to\z@{\eq@addframe\hss}}%
+  \fi
+  \rlap{\kern-\leftskip\kern\linewidth\kern-\wd\EQ@numbox\copy\EQ@numbox}%
+  \eq@dump@box\unhbox\EQ@box 
+  \@@par
+}
+%    \end{macrocode}
+%
 % 
 % 
 % \section{Special processing for end-of-equation}
@@ -2809,7 +2881,8 @@ and the derived files
 % 
 % 
 % \begin{macro}{\check@punct}
-% 
+%   \changes{v0.96a}{2007/12/17}{Insert \cs{finish@end} if no special
+%     case is found.}
 % For this one we need to recognize and grab for inclusion any of the
 % following tokens: \verb",;.!?", both catcode 12 (standard \latex 
 % value) and catcode 13 (as might hold when the Babel package is
@@ -2847,6 +2920,7 @@ and the derived files
   \else\ifx\@let@token ;\@nx\check@qed
   \else\ifx\@let@token ?\@nx\check@qed
   \else\ifx\@let@token !\@nx\check@qed
+  \else\@nx\finish@end
   \fi\fi\fi\fi\fi
 }
 \xdef\check@punct@b{%
@@ -2968,8 +3042,15 @@ and the derived files
 \def\eq@topspace#1{%
   \begingroup
     \global\let\EQ@shortskips\@False
-    \if\@And{\eq@group}{\@Not\GRP@top}%
-      \parskip\intereqskip \penalty\intereqpenalty
+%    \end{macrocode}
+% If we are in \env{dgroup} or \env{dgroup*} and not before the top
+% one, we just insert \cs{intereqskip}. Otherwise we must check for
+% shortskip.
+%    \begin{macrocode}
+    \if\@And{\eq@group}{\@Not\eq@GRP@first@dmath}%
+%<trace>\breqn@debugmsg{Between lines}%
+        \parskip\intereqskip \penalty\intereqpenalty
+%<trace>\breqn@debugmsg{parskip=\the\parskip}%
     \else
       \eq@check@shortskip
       \if\EQ@shortskips
@@ -2987,29 +3068,59 @@ and the derived files
     \else
       \addtolength\parskip{\eq@framesep+\eq@framewd}%
     \fi
-\debugmsg{Topspace: \theb@@le\EQ@shortskips, \parskip=\the\parskip, \predisplaysize=\the\predisplaysize}%
+%<*trace>
+    \breqn@debugmsg{Topspace: \theb@@le\EQ@shortskips, \parskip=\the\parskip, 
+      \predisplaysize=\the\predisplaysize}%
+%</trace>
     #1%
   \endgroup
 }
-\def\eq@check@shortskip{%
+%    \end{macrocode}
+% \begin{macro}{\eq@check@shortskip}
+%   \changes{v0.96a}{2007/12/17}{Insert \cs{finish@end} if no special
+%     case is found.}
+%   \changes{v0.97a}{2007/12/22}{Use design parameter and fix
+%   shortskips properly.}
+%    \begin{macrocode}
+\def\eq@check@shortskip {%
   \global\let\EQ@shortskips\@False
   \setlength\dim@a{\abovedisplayskip+\ht\EQ@numbox}%
-  \addtolength\leftskip{-2em}% standard TeX value
+%    \end{macrocode}
+% Here we work around the hardwired standard TeX value and use the
+% designer parameter instead.
+%    \begin{macrocode}
   \ifdim\leftskip<\predisplaysize
-  \else\if R\eqnumside  \global\let\EQ@shortskips\@True
-  \else\if\eq@shiftnumber
-  \else\if T\eqnumplace
-    \ifdim\dim@a<\eq@firstht
-      \global\let\EQ@shortskips\@True
-    \fi
   \else
-    \setlength\dim@b{\eq@vspan/2}%
-    \ifdim\dim@a<\dim@b
-      \global\let\EQ@shortskips\@True
+%    \end{macrocode}
+% If the display was preceeded by a blank line, \cs{predisplaysize} is
+% $-\cs{maxdimen}$ and so we should insert a fairly large skip to
+% separate paragraphs, i.e., no short skip. Perhaps this should be a
+% third parameter \cs{abovedisplayparskip}.
+%    \begin{macrocode}
+    \ifdim -\maxdimen=\predisplaysize
+    \else
+      \if R\eqnumside
+        \global\let\EQ@shortskips\@True
+      \else
+        \if\eq@shiftnumber
+        \else
+          \if T\eqnumplace
+            \ifdim\dim@a<\eq@firstht
+              \global\let\EQ@shortskips\@True
+            \fi
+          \else
+            \setlength\dim@b{\eq@vspan/2}%
+            \ifdim\dim@a<\dim@b
+              \global\let\EQ@shortskips\@True
+            \fi
+          \fi
+        \fi
+      \fi
     \fi
-  \fi\fi\fi\fi
+  \fi
 }
 %    \end{macrocode}
+% \end{macro}
 % 
 % At the end of an equation, need to put in a pagebreak penalty
 % and some vertical space.    Also set some flags to remove parindent
@@ -3263,9 +3374,9 @@ and the derived files
 % added after it by \tex .    Should we remove it?    I guess
 % so.   
 %
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% Capturing the equation
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% \subsection{Capturing the equation}
+%
 % BRM: There's a problem here (or with \cs{ss@scan}).  If the LHS has
 % \cs{left} \cs{right} pairs, \ss@scan gets involved.  It seems to produce
 % a separate box marked w/\cs{penalty} 3.  But it appears that \cs{eq@repack}
@@ -3314,17 +3425,25 @@ and the derived files
     % Apparently missing a \thickmuskip = 5mu = 5/18em=0.27777777777.. ?
        + 0.2777777777777em}% FUDGE??!?!?!
     \ifdim\dim@a>\eq@wdL
-      \debugmsg{Correcting LHS from \the\eq@wdL\space to \the\dim@a = \the\wd\EQ@box - \the\eq@wdR}%
+%<*trace>
+      \breqn@debugmsg{Correcting LHS from \the\eq@wdL\space to 
+                \the\dim@a = \the\wd\EQ@box - \the\eq@wdR}%
+%</trace>
       \eq@wdL\dim@a
       \xdef\EQ@setwdL{\eq@wdL\the\eq@wdL\relax}%
     \fi
   \fi
-  \debugmsg{Capture: total length=\the\wd\EQ@box
-           ^^J||===== has LHS=\theb@@le\EQ@hasLHS, \eq@wdL=\the\eq@wdL, \eq@wdR=\the\eq@wdR,
-           ^^J||===== \eq@wdCond=\the\eq@wdCond}%
+%<*trace>
+  \breqn@debugmsg{Capture: total length=\the\wd\EQ@box \MessageBreak
+           ==== has LHS=\theb@@le\EQ@hasLHS, \eq@wdL=\the\eq@wdL, \eq@wdR=\the\eq@wdR,
+           \MessageBreak
+           ==== \eq@wdCond=\the\eq@wdCond}%
+%</trace>
   \egroup % end vbox started earlier
+%<*trace>
 %\debugwr{EQ@box}\debug@box\EQ@box
 %\debugwr{EQ@copy}\debug@box\EQ@copy
+%</trace>
 }
 %    \end{macrocode}
 % Now we have two copies of the equation, one in \cs{EQ@box},
@@ -3643,7 +3762,7 @@ and the derived files
 % need to know how many lines the equation will require.   
 % And of course the number of lines needed depends on the parshape!   
 % So as our very first trial we run a simple first-approximation
-% parshape (Figure~\ref{f:parshape-1}) whose
+% parshape (Figure~\vref{f:parshape-1}) whose
 % main purpose is to get an estimate on the number of lines that will be
 % needed; it chooses a uniform indent for all lines after the first one
 % and does not take any account of the equation number.   
@@ -3738,31 +3857,35 @@ and the derived files
 %    \end{macrocode}
 % \end{macro}
 %    \begin{macrocode}
+%<*trace>
 \def\debug@showmeasurements{%
-  \debugmsg{=> \number\eq@lines\space lines}%
-  \debug
-  \def\@elt##1^^J##2{^^J||===== \space\space##1/##2}%
+  \breqn@debugmsg{=> \number\eq@lines\space lines}%
+  \begingroup
+  \def\@elt##1X##2{\MessageBreak==== \space\space##1/##2}%
   \let\@endelt\@empty
-  \debugmsg{=> trial info:\eq@measurements}%
-  \debugmsg{=> bounding box: \the\eq@wdT x\the\eq@vspan, badness=\the\eq@badness}%
+  \breqn@debugmsg{=> trial info:\eq@measurements}%
+  \breqn@debugmsg{=> bounding box: \the\eq@wdT x\the\eq@vspan, badness=\the\eq@badness}%
   \let\@elt\relax \let\@endelt\relax
-  \gubed
+  \endgroup
 }
 \def\debug@showmeasurements{%
   \begingroup
-  \def\@elt##1^^J##2{^^J||=====   ##1/##2}%
+  \def\@elt##1X##2{\MessageBreak====   ##1/##2}%
   \let\@endelt\@empty
-  \debugmsg{===> Measurements: \number\eq@lines\space lines
+  \breqn@debugmsg{===> Measurements: \number\eq@lines\space lines
            \eq@measurements
-           ^^J||===== bounding box: \the\eq@wdT x\the\eq@vspan, badness=\the\eq@badness
-           ^^J||===== \leftskip=\the\leftskip, \rightskip=\the\rightskip}%
+           \MessageBreak
+           ==== bounding box: \the\eq@wdT x\the\eq@vspan, badness=\the\eq@badness
+           \MessageBreak
+           ==== \leftskip=\the\leftskip, \rightskip=\the\rightskip}%
  \endgroup
 }
+%</trace>
 %    \end{macrocode}
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
 % Layout Trials Driver
 % Basically, trying different sequences of parshapes.
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
 % 
 % \begin{macro}{\EQ@trial}
 % Init.   
@@ -3846,16 +3969,18 @@ and the derived files
   \if T\eq@frame \eq@frame@adjust\dim@c \fi
   \ifdim\dim@c>\eq@linewidth
     \eq@linewidth\dim@c 
-    \debugmsg{Choose Shape for width(#1)=\the\eq@linewidth}%
+%<trace>    \breqn@debugmsg{Choose Shape for width(#1)=\the\eq@linewidth}%
     \let\eq@trial@b\eq@trial@d
     \csname eq@try@layout@\eq@layout\endcsname
-  \else
-    \debugmsg{Next width (#1) is shorter; skip it}%
+%<trace>  \else
+%<trace>    \breqn@debugmsg{Next width (#1) is shorter; skip it}%
   \fi
   \edef\eq@linewidths{\iffalse}\fi
 }
 \def\eq@frame@adjust#1{%
-  \addtolength#1{-2\eq@framewd-2\eq@framesep}%
+  %\addtolength#1{-2\eq@framewd-2\eq@framesep}%
+  \dim@a\eq@framewd \advance\dim@a\eq@framesep
+  \advance#1-2\dim@a
 }
 %    \end{macrocode}
 % \end{macro}
@@ -3873,7 +3998,7 @@ and the derived files
 % Success.   
 %    \begin{macrocode}
 \def\eq@trial@done{%
-  \debugmsg{End trial: Success!}%
+%<trace>  \breqn@debugmsg{End trial: Success!}%
   \let\eq@failout\relax
 }
 %    \end{macrocode}
@@ -3895,7 +4020,7 @@ and the derived files
 %    \begin{macrocode}
 \def\eq@nextlayout#1{% 
   \endgroup
-  \debugmsg{Nope ... that ain't gonna work.}%
+%<trace>  \breqn@debugmsg{Nope ... that ain't gonna work.}%
   \begingroup #1%
 }
 %    \end{macrocode}
@@ -3906,7 +4031,7 @@ and the derived files
 % .   
 %    \begin{macrocode}
 \def\eq@failout{%
-\debugmsg{End trial: failout}%
+%<trace>\breqn@debugmsg{End trial: failout}%
   \global\let\EQ@trial\EQ@last@trial
 }
 %    \end{macrocode}
@@ -3917,10 +4042,12 @@ and the derived files
 % Save the parameters of the current trial.   
 %    \begin{macrocode}
 \def\eq@trial@save#1{%
-%  \debug \def\@elt##1^^J##2{^^J||===== \space\space##1/##2}\let\@endelt\@empty\debugmsg{=> trial info:\eq@measurements}%
-%         \debugmsg{=> bounding box: \the\eq@wdT x\the\eq@vspan, badness=\the\eq@badness^^J}%
+%<*trace>
+%  \begingroup \def\@elt##1X##2{\MessageBreak==== \space\space##1/##2}\let\@endelt\@empty\breqn@debugmsg{=> trial info:\eq@measurements}%
+%         \breqn@debugmsg{=> bounding box: \the\eq@wdT x\the\eq@vspan, badness=\the\eq@badness\MessageBreak}%
 %         \let\@elt\relax \let\@endelt\relax
-%  \gubed
+%  \endgroup
+%</trace>
   \xdef#1{%
     \eq@linewidth\the\eq@linewidth
     % save info about the fit
@@ -3960,7 +4087,7 @@ and the derived files
 % Run the equation contents through the current parshape.   
 %    \begin{macrocode}
 \def\eq@trial@c#1#2{%
-  \debugmsg{Trying layout "#1" with^^J||===== parshape\space\@xp\@gobble\@parshape}%
+%<trace>  \breqn@debugmsg{Trying layout "#1" with\MessageBreak==== parshape\space\@xp\@gobble\@parshape}%
   \begingroup
   \eq@trial@init
   \def\eq@layout{#1}%
@@ -4003,9 +4130,9 @@ and the derived files
 % 
 %    \begin{macrocode}
 \def\eq@check@density{%
-  \debugmsg{Checking density for layout L}%
+%<trace>  \breqn@debugmsg{Checking density for layout L}%
   \if\@Or{\@Not\EQ@hasLHS}{\eq@shortLHS}%
-    \debugmsg{Density check: No LHS, or is short; OK}%
+%<trace>    \breqn@debugmsg{Density check: No LHS, or is short; OK}%
     \eq@trial@succeed
   \else\if\eq@dense@enough
     \eq@trial@succeed
@@ -4041,7 +4168,7 @@ and the derived files
   \eq@ml@record@indents
   \eq@measure@lines
   \eq@recalc
-  \debug@showmeasurements
+%<trace>  \debug@showmeasurements
 }
 %    \end{macrocode}
 % 
@@ -4102,12 +4229,12 @@ and the derived files
 % \begin{macro}{\eq@recalc@b}
 % 
 %    \begin{macrocode}
-\def\eq@recalc@b#1^^J#2,#3x#4+#5@#6\@endelt{%
+\def\eq@recalc@b#1X#2,#3x#4+#5@#6\@endelt{%
   \setlength\dim@a{#2+#3}%
   \ifdim\dim@a>\eq@wdT \eq@wdT\dim@a \fi
   \ifdim\dim@a<\eq@wdMin \eq@wdMin\dim@a \fi
   \eq@dp#5\relax
-  \addtolength\eq@vspan{#1+#4+#5}%
+  \addtolength\eq@vspan{#1+#4+\eq@dp}%
 %    \end{macrocode}
 % Record the max badness of all the lines in \cs{eq@badness}.   
 %    \begin{macrocode}
@@ -4123,14 +4250,13 @@ and the derived files
 % Any other value means we have a user-specified override on the
 % layout.   
 %
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
 % Layout Definitions.
 % Based on initial equation measurements, we can choose a sequence of
 % candidate parshapes that the equation might fit into.
 % We accept the first shape that `works', else fall to next one.
 % [The sequence is hardcoded in the \cs{eq@try@layout@}<shape>
 %  Would it be useful be more flexible? (eg. try layouts LDA, in order...)]
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %    \begin{macrocode}
 \def\eq@layout{?}
 %    \end{macrocode}
@@ -4157,15 +4283,18 @@ and the derived files
     \else\if\grp@hasNumber\addtolength\dim@b{-\wd\GRP@numbox-\eqnumsep}%
   \fi\fi\fi\fi
   \ifdim\dim@a<\dim@b% Do we even have a chance of fitting to one line?
-    \debugmsg{Choose Shape: (\the\wd\EQ@copy) may fit in \the\dim@b}%
-%BRM%
-    % assuming it might fit, don't push too hard
+%<trace>    \breqn@debugmsg{Choose Shape: (\the\wd\EQ@copy) may fit in \the\dim@b}%
+%    \end{macrocode}
+% BRM: assuming it might fit, don't push too hard
+%    \begin{macrocode}
     \setlength\dim@b{\columnwidth-\dim@a+\eq@wdCond}%
     \rightskip\z@\@plus\dim@b\@minus\hfuzz
-%
     \eq@trial@b{i}{\eq@try@layout@multi}%
   \else
-    \debugmsg{Choose Shape: Too long (\the\wd\EQ@copy) for one line (free width=\the\dim@b)}%
+%<*trace>    
+  \breqn@debugmsg{Choose Shape: Too long (\the\wd\EQ@copy) for one line
+            (free width=\the\dim@b)}%
+%</trace>
    \eq@try@layout@multi
   \fi
 }
@@ -4177,7 +4306,7 @@ and the derived files
 \def\eq@try@layout@multi{%
   \if\EQ@hasLHS
     \ifdim\eq@wdL>\eq@linewidth
-       \debugmsg{Choose Shape: LHS \the\eq@wdL > linewidth}%
+%<trace>       \breqn@debugmsg{Choose Shape: LHS \the\eq@wdL > linewidth}%
 %    \end{macrocode}
 % Find the total width of the RHS.   
 % If it is relatively short, a step layout is the thing to try.   
@@ -4188,14 +4317,16 @@ and the derived files
        \fi
     % BRM: Originally .7: Extreme for L since rhs has to wrap within the remaining 30+%!
     \else\ifdim\eq@wdL>.50\eq@linewidth
-      \debugmsg{Choose Shape: LHS (\the\eq@wdL) > .50 linewidth (linewidth=\the\eq@linewidth)}%
+%<*trace>
+      \breqn@debugmsg{Choose Shape: LHS (\the\eq@wdL) > .50 linewidth (linewidth=\the\eq@linewidth)}%
+%</trace>
       \eq@try@layout@D
     \else
-      \debugmsg{Choose Shape: LHS (\the\eq@wdL) not extraordinarily wide}%
+%<trace>      \breqn@debugmsg{Choose Shape: LHS (\the\eq@wdL) not extraordinarily wide}%
       \eq@try@layout@L
     \fi\fi
   \else
-    \debugmsg{Choose Shape: No LHS here}%
+%<trace>    \breqn@debugmsg{Choose Shape: No LHS here}%
 %    \end{macrocode}
 % Try one-line layout first, then step layout.   
 %    \begin{macrocode}
@@ -4366,13 +4497,13 @@ and the derived files
 %    \begin{macrocode}
 \def\eq@retry@with@number{%
  \if\eq@shiftnumber
-   \debugmsg{Place number: Shifted number requested}%
+%<trace>   \breqn@debugmsg{Place number: Shifted number requested}%
  \else
 %    \end{macrocode}
 % Condition and right numbers? We're just going to have to shift.
 %    \begin{macrocode}
     \ifdim\eq@wdCond>\z@\if R\eqnumside
-      \debugmsg{Place number: Condition w/Right number => Shift number}%
+%<trace>      \breqn@debugmsg{Place number: Condition w/Right number => Shift number}%
       \let\eq@shiftnumber\@True
     \fi\fi
 %    \end{macrocode}
@@ -4399,12 +4530,14 @@ and the derived files
 % left \& right skips will be done later, and parshape adjusted if
 % needed.
 %    \begin{macrocode}
-      \debugmsg{Place number: eqn and number fit together}%
+%<trace>      \breqn@debugmsg{Place number: eqn and number fit together}%
 %    \else\ifnum\eq@lines=\int@a %  Shift, if single line, unless inside a dgroup.
 %    \end{macrocode}
 % NOTE: this is too strong for dgroup!
 %    \begin{macrocode}
-%      \debugmsg{Place number: single line too long with number => Shift number \the\int@a}%
+%<*trace>
+%      \breqn@debugmsg{Place number: single line too long with number => Shift number \the\int@a}%
+%</trace>
 %      \let\eq@shiftnumber\@True
     \else
 %    \end{macrocode}
@@ -4415,8 +4548,10 @@ and the derived files
       \setlength\leftskip{\eq@wdNum}%
       \setlength\rightskip{\z@\@plus\dim@a}%
       \adjust@parshape\@parshape
-      \debugmsg{Place number: Try with \leftskip=\the\leftskip, \rightskip=\the\rightskip,
-                ^^J||===== parshape\space\@xp\@gobble\@parshape}%
+%<*trace>
+      \breqn@debugmsg{Place number: Try with \leftskip=\the\leftskip, \rightskip=\the\rightskip,
+                \MessageBreak==== parshape\space\@xp\@gobble\@parshape}%
+%</trace>
       \nointerlineskip
       \edef\eq@prev@lines{\the\eq@lines}%
       \edef\eq@prev@badness{\the\eq@badness}% BRM
@@ -4424,16 +4559,19 @@ and the derived files
       \int@a\eq@prev@badness\relax\advance\int@a 50\relax%?
       \int@b\eq@prev@lines  \if\eq@group\advance\int@b\@ne\fi% Allow 1 extra line in group
       \ifnum\eq@lines>\int@b % \eq@prev@lines
-        \debugmsg{Adjustment causes more breaks => Shift number}%
+%<trace>        \breqn@debugmsg{Adjustment causes more breaks => Shift number}%
         \let\eq@shiftnumber\@True
       \else\if\eq@badline
-        \debugmsg{Adjustment causes bad lines (\the\eq@badness) => Shift}%
+%<trace>        \breqn@debugmsg{Adjustment causes bad lines (\the\eq@badness) => Shift}%
         \let\eq@shiftnumber\@True
       \else\ifnum\eq@badness>\int@a % BRM: New case
-        \debugmsg{Adjustment is badder than previous (\the\eq@badness >> \eq@prev@badness) => Shift}%
+%<*trace>
+        \breqn@debugmsg{Adjustment is badder than previous
+                  (\the\eq@badness >> \eq@prev@badness) => Shift}%
+%</trace>
         \let\eq@shiftnumber\@True
       \else
-        \debugmsg{Adjustment succeeded}%
+%<trace>        \breqn@debugmsg{Adjustment succeeded}%
       \fi\fi%\fi
    \fi\fi\fi
 %    \end{macrocode}
@@ -4568,7 +4706,9 @@ and the derived files
 %    \begin{macrocode}
 \def\eq@ml@a{%
   \setbox\tw@\hbox{\unhbox\z@ \unskip}% find natural width
-  \debug\ifnum\eq@badness<\inf@bad\else\debugmsg{!?! Overfull: \the\wd\tw@ >\the\dim@b}\fi\gubed
+%<*trace>
+  \ifnum\eq@badness<\inf@bad\else\breqn@debugmsg{!?! Overfull: \the\wd\tw@ >\the\dim@b}\fi
+%</trace>
 %    \end{macrocode}
 % Is actual width less than natural width?   
 %    \begin{macrocode}
@@ -4592,7 +4732,7 @@ and the derived files
     }%
   \fi
   \edef\eq@measurements{\@elt
-    \the\skip@a\space^^J% extra space to facilitate extracting only the
+    \the\skip@a\space X% extra space to facilitate extracting only the
                         % dimen part later
     \csname eq@i%
       \ifnum\eq@curline<\parshape \number\eq@curline
@@ -4627,11 +4767,11 @@ and the derived files
 %    \begin{macrocode}
 \def\eq@dense@enough{%
   \ifnum\eq@lines<\thr@@ 
-    \debugmsg{Density check: less than 3 lines; OK}%
+%<trace>    \breqn@debugmsg{Density check: less than 3 lines; OK}%
     \@True
   \else
     \ifdim\eq@wdL >.7\eq@wdT 
-     \debugmsg{Density check: LHS too long; NOT OK}%
+%<trace>     \breqn@debugmsg{Density check: LHS too long; NOT OK}%
       \@False
     \else \@xp\@xp\@xp\eq@dense@enough@a
     \fi
@@ -4697,7 +4837,7 @@ and the derived files
   \else
     \dim@b\z@ \let\@elt\eq@delt \eq@measurements
     \dim@c\eq@density@factor\eq@wdT \multiply\dim@c\eq@lines
-    \debugmsg{Density check: black \the\dim@b/\eq@density@factor total \the\dim@c}%
+%<trace>    \breqn@debugmsg{Density check: black \the\dim@b/\eq@density@factor total \the\dim@c}%
     \ifdim\dim@b>\dim@c \true@false@true \else \false@false@false \fi
   \fi
 }
@@ -4708,7 +4848,7 @@ and the derived files
 % \begin{macro}{\eq@delt}
 % Args are space-above, indent, width, height, depth, badness.   
 %    \begin{macrocode}
-\def\eq@delt#1^^J#2,#3x#4+#5@#6\@endelt{\addtolength\dim@b{#3}}%
+\def\eq@delt#1X#2,#3x#4+#5@#6\@endelt{\addtolength\dim@b{#3}}%
 %    \end{macrocode}
 % \end{macro}
 % 
@@ -4736,7 +4876,7 @@ and the derived files
   \dim@c\eq@lines\p@ \multiply\dim@c\f@ur
   \int@b\eq@lines \multiply\int@b 9 \advance\int@b -10%
   \divide\dim@c\int@b
-  \debugmsg{Density check: l/t \the\dim@b\space< \the\dim@c\space 4n/(9n-10)?}%
+%<trace>  \breqn@debugmsg{Density check: l/t \the\dim@b\space< \the\dim@c\space 4n/(9n-10)?}%
   \ifdim\dim@b<\dim@c \true@true@true \else \false@true@false \fi
 }
 %    \end{macrocode}
@@ -4766,7 +4906,7 @@ and the derived files
 % of a page; instead it will be moved whole to the top of the next
 % page.    If you really really need a page break that splits the
 % first or last line from the rest of the equation, you can always fall
-% back to\cs{pagebreak}, I suppose9.   
+% back to\cs{pagebreak}, I suppose.   
 % 
 %    \begin{macrocode}
   \clubpenalty\@M \widowpenalty\@M \interlinepenalty\eqinterlinepenalty
@@ -4805,6 +4945,68 @@ and the derived files
 % I, IRM, IRB, ILM, ILT.    In other words, CLM stands for Centered equation
 % body with Left-hand Middle-placed equation number, and IRB stands for
 % Indented equation with Right-hand Bottom-placed equation number.   
+%
+% Here are some general thoughts on how to place an equation
+% tag. Currently it does not work as desired: the L option positions
+% the tag app. 10 lines below the math expression, the RM doesn't
+% position the tag on the baseline for single-line math
+% expressions. Therefore I am going to first write what I think is
+% supposed to happen and then implement it. 
+%
+% Below is a small list where especially the two three specifications
+% should be quite obvious, I just don't want to forget anything and it
+% is important to the implementation.
+% \begin{description}
+% \item[Definition 1] If a display consists of exactly one line, the
+%   tag should always be placed on the same baseline as the math
+%   expression.
+% \end{description}
+% The remaining comments refer to multi-line displays.
+% \begin{description}
+% \item[Definition 2] If a tag is to be positioned at the top (T), it
+%   should be placed such that the baseline of the tag aligns with the
+%   baseline of the top line of the display.
+%
+% \item[Definition 3] If a tag is to be positioned at the bottom (B),
+%   it should be placed such that the baseline of the tag aligns with
+%   the baseline of the bottom line of the display.
+%
+% \item[Definition 4] If a tag is to be positioned vertically centered
+%   (M), it should be placed such that the baseline of the tag is
+%   positioned exactly halfway between the baseline of the top line of
+%   the display and the baseline of the bottom line of the display.
+% \end{description}
+% 
+% Definitions 1--3 are almost axiomatic in their
+% simplicity. Definition~4 is different because I saw at least two
+% possibilities for which area to span:
+% \begin{itemize}
+% \item Calculate distance from top of top line to the bottom of the
+%   bottom line, position the vertical center of the tag exactly
+%   halfway between those two extremes.
+% 
+% \item Calculate the distance from the baseline of the top line to
+%   the baseline of the bottom line, position the baseline of the tag
+%   exactly halfway between these two extremes.
+% \end{itemize}
+% Additional combinations of these methods are possible but make
+% little sense in my opinion. I have two reasons for choosing the
+% latter of these possibilities: Firstly, two expressions looking
+% completely identical with the exception of a superscript in the
+% first line or a subscript in the last line will have the tag
+% positioned identically. Secondly, then M means halfway between T and
+% B positions which makes good sense and then also automatically
+% fulfills Definition~1.
+%
+% From an implementation perspective, these definitions should also
+% make it possible to fix a deficiency in the current implementation,
+% namely that the tag does not influence the height of a display, even
+% if the display is a single line. This means that two single-line
+% expressions in a \env{dgroup} can be closer together than
+% \cs{intereqskip} if the math expressions are (vertically) smaller
+% than the tag.
+%
+%
 % 
 % 
 % \section{Centered Right-Number Equations}
@@ -4834,25 +5036,27 @@ and the derived files
 % \end{macro}
 %
 %
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
 % Various typesetting bits, invoked from \cs{eq@finish}
 % BRM: This has been extensively refactored from the original breqn,
 % initially to get left\textbar right skips and parshape used consistently,
 % ultimately to get most things handled the same way, in the same order.
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+%
 % Given that left and right skips have been set,
 % typeset the frame, number and equation with the
 % given number side and placement
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+%
+% 
 %    \begin{macrocode}
 \def\eq@typeset@Unnumbered{%
   \eq@typeset@frame
   \eq@typeset@equation
 }
 \def\eq@typeset@LM{%
-  \addtolength\dim@a{(\eq@vspan+\ht\EQ@numbox-\dp\EQ@numbox)/2}%
+  \setlength\dim@a{(\eq@vspan+\ht\EQ@numbox-\dp\EQ@numbox)/2}%
   \eq@typeset@leftnumber
   \eq@typeset@frame
   \eq@typeset@equation
@@ -4884,7 +5088,7 @@ and the derived files
 % Typeset equation and right middle number
 %    \begin{macrocode}
 \def\eq@typeset@RM{%
-  \setlength\dim@a{(\eq@vspan+\ht\EQ@numbox-\dp\EQ@numbox)/2}
+  \setlength\dim@a{(\eq@vspan+\ht\EQ@numbox-\dp\EQ@numbox)/2}%
   \eq@typeset@rightnumber
   \eq@typeset@frame
   \eq@typeset@equation
@@ -4915,25 +5119,28 @@ and the derived files
   \hbox to\hsize{\hfil\copy\EQ@numbox}\@@par%
 }
 %    \end{macrocode}
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
 % Debugging aid to show all relevant formatting info for a given eqn.
 %    \begin{macrocode}
+%<*trace>
 \def\debug@showformat{%
-  \debugmsg{Formatting Layout:\eq@layout\space Center/indent: \eqindent\space Number placement \eqnumside\eqnumplace: 
-           ^^J||===== \eq@linewidth=\the\eq@linewidth, \@totalleftmargin=\the\@totalleftmargin,
-           ^^J||===== Centered Lines=\theb@@le\eq@centerlines, Shift Number=\theb@@le\eq@shiftnumber,
-           ^^J||===== \eq@wdT=\the\eq@wdT, \eq@wdMin=\the\eq@wdMin,
-           ^^J||===== LHS=\theb@@le\EQ@hasLHS: \eq@wdL=\the\eq@wdL, 
-           ^^J||===== \eq@firstht=\the\eq@firstht, \eq@vspan=\the\eq@vspan
-           ^^J||===== \eq@wdNum=\the\eq@wdNum
-           ^^J||===== \eq@wdCond=\the\eq@wdCond, \conditionsep=\the\conditionsep,
-           ^^J||===== \leftskip=\the\leftskip, \rightskip=\the\rightskip,
-           ^^J||===== \abovedisplayskip=\the\abovedisplayskip,
-           ^^J||===== \belowdisplayskip=\the\belowdisplayskip
-           ^^J||===== parshape=\eq@parshape}%
-}
+  \breqn@debugmsg{Formatting Layout:\eq@layout\space Center/indent: \eqindent\space
+    Number placement \eqnumside\eqnumplace: 
+    \MessageBreak==== \eq@linewidth=\the\eq@linewidth, \@totalleftmargin=\the\@totalleftmargin,
+    \MessageBreak==== Centered Lines=\theb@@le\eq@centerlines, Shift Number=\theb@@le\eq@shiftnumber,
+    \MessageBreak==== \eq@wdT=\the\eq@wdT, \eq@wdMin=\the\eq@wdMin,
+    \MessageBreak==== LHS=\theb@@le\EQ@hasLHS: \eq@wdL=\the\eq@wdL, 
+    \MessageBreak==== \eq@firstht=\the\eq@firstht, \eq@vspan=\the\eq@vspan
+    \MessageBreak==== \eq@wdNum=\the\eq@wdNum
+    \MessageBreak==== \eq@wdCond=\the\eq@wdCond, \conditionsep=\the\conditionsep,
+    \MessageBreak==== \leftskip=\the\leftskip, \rightskip=\the\rightskip,
+    \MessageBreak==== \abovedisplayskip=\the\abovedisplayskip,
+    \MessageBreak==== \belowdisplayskip=\the\belowdisplayskip
+    \MessageBreak==== parshape=\eq@parshape}%
+}
+%</trace>
 %    \end{macrocode}
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
 % Set left \& right skips for centered equations, 
 % making allowances for numbers (if any, right, left) and constraint.
 % ===
@@ -4989,13 +5196,16 @@ and the derived files
   \fi\fi
   % Now, \dim@d,\dim@e is the left & right glue to center each line for centerlines
   \setlength\dim@e{\eq@wdT-\eq@wdMin}\dim@d=\z@
+%    \end{macrocode}
 % NOTE: Need some work here centering when there's a condition
+%    \begin{macrocode}
 %  \advance\dim@e-\eq@wdT\multiply\dim@e-1\relax
 %  \if\eq@wdMin<\dim@e\dim@e\eq@wdMin\fi
 %  \multiply\dim@e-1\relax\advance\dim@e\eq@wdT
   \dim@d\z@
   \if\eq@centerlines
-    \divide\dim@e2\relax\dim@d\dim@e
+    \divide\dim@e2\relax
+    \dim@d=\dim@e
   \fi
   \setlength\leftskip{\dim@a\@plus\dim@d}%
   \addtolength\dim@e{\dim@c}%
@@ -5006,10 +5216,14 @@ and the derived files
   \if F\eq@frame\else
     \dim@b\dim@c
   \fi
-  \if\eq@hasNumber\if\eq@shiftnumber\else\if R\eqnumside
-    \dim@c\eq@wdNum
-    \ifdim\dim@c>\dim@b\dim@b\dim@c\fi
-  \fi\fi\fi
+  \if\@And{\eq@hasNumber}{\@Not{\eq@shiftnumber}}%
+    \if R\eqnumside
+      \dim@c\eq@wdNum
+      \ifdim\dim@c>\dim@b
+        \dim@b\dim@c
+      \fi
+    \fi
+  \fi
   % If either of those cases requires hard rightskip, move that part from glue.
   \ifdim\dim@b>\z@
     \addtolength\dim@e{-\dim@c}%
@@ -5017,41 +5231,55 @@ and the derived files
   \fi
   % And peculiar further special case: in indented environs, width isn't where it would seem
   \ifdim\eq@wdCond>\z@
-     \addtolength\rightskip{-\@totalleftmargin}%
+    \addtolength\rightskip{-\@totalleftmargin}%
   \fi
   \parfillskip\z@skip
 }
 %    \end{macrocode}
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
 % Set the left and right side spacing for indented equations
 % Some things handled by eq@C@setsides that probably apply here????
-%  * centerlines
-%  * \cs{@totalleftmargin}: SHOULD we move farther right? 
+% \begin{itemize}
+% \item centerlines
+% \item \cs{@totalleftmargin}: SHOULD we move farther right? 
+% \end{itemize}
+% Leftskip is normally just the requested indentation
 %    \begin{macrocode}
 \def\eq@I@setsides{%
-  % Leftskip is normally just the requested indentation
   \leftskip\mathindent
-  % But move left, if shifted number presumably because of clashed w/ number?
+%    \end{macrocode}
+% But move left, if shifted number presumably because of clashed w/ number?
+%    \begin{macrocode}
   \if\eq@shiftnumber
     \setlength\dim@a{\eq@linewidth-\eq@wdT-\mathindent}%
     \ifdim\dim@a<\z@
       \leftskip=\z@ % Or something minimal?
-  \fi\fi
-  % Push gently from right.
+    \fi
+  \fi
+%    \end{macrocode}
+% Push gently from right.
+%    \begin{macrocode}
   \dim@a=\z@
   \setlength\dim@b{\eq@linewidth-\leftskip-\eq@wdMin}%
-  % Special case: if framing be much more rigid(?)
-  \if F\eq@frame\else
+%    \end{macrocode}
+% Special case: if framing be much more rigid(?)
+%    \begin{macrocode}
+  \if F\eq@frame
+  \else
     \setlength\dim@a{\eq@linewidth-\leftskip-\eq@wdT}
     \addtolength\dim@b{-\dim@a}%
   \fi
   % Or force the space for right number, if needed
-  \if\eq@hasNumber\if\eq@shiftnumber\else\if R\eqnumside
-    \dim@c=\eq@wdNum
-    \if\dim@c>\dim@a
-      \addtolength\dim@b{-\dim@c}%
-      \dim@a=\dim@c
-  \fi\fi\fi\fi
+%    \begin{macrocode}
+  \if\@And{\eq@hasNumber}{\@Not{\eq@shiftnumber}}%
+    \if R\eqnumside
+      \dim@c=\eq@wdNum
+      \if\dim@c>\dim@a
+        \addtolength\dim@b{-\dim@c}%
+        \dim@a=\dim@c
+      \fi
+    \fi
+  \fi
   \setlength\rightskip{\dim@a\@plus\dim@b \@minus\hfuzz }%\hfuzz\z@
   \parfillskip\z@skip
 }
@@ -5097,6 +5325,8 @@ and the derived files
 }
 %    \end{macrocode}
 % \end{macro}
+% The frame is not typeset at the correct horizontal position. Will
+% fix later.
 %    \begin{macrocode}
 \def\eq@addframe{%
   \hbox to\z@{%
@@ -5847,7 +6077,6 @@ and the derived files
 \let\grp@hasNumber\@False
 \let\grp@eqs@numbered\@False
 \let\grp@aligned\@True
-\global\let\GRP@top\@True
 %    \end{macrocode}
 % 
 % \end{macro}
@@ -5871,8 +6100,8 @@ and the derived files
   \end@dgroup
 }
 \def\@dgroup[#1]{%
-  \debugmsg{=== DGROUP ==================================================}%
-  \let\eq@group\@True \global\let\GRP@top\@True
+%<trace>  \breqn@debugmsg{=== DGROUP ==================================================}%
+  \let\eq@group\@True \global\let\eq@GRP@first@dmath\@True
   \global\GRP@queue\@emptytoks \global\setbox\GRP@box\box\voidb@x
   \global\let\GRP@label\@empty
   \global\grp@wdL\z@\global\grp@wdR\z@\global\grp@wdT\z@
@@ -5936,7 +6165,7 @@ and the derived files
 %    \begin{macrocode}
   \setcounter{equation}{0}%
   \def\theequation{\theparentequation\alph{equation}}%
-  \debugmsg{Group Number \theequation}%
+%<trace>  \breqn@debugmsg{Group Number \theequation}%
 }
 %    \end{macrocode}
 % At the end of a group, need to reset the equation counter.   
@@ -5948,9 +6177,11 @@ and the derived files
 \newbox\GRP@wholebox
 %    \end{macrocode}
 % Save data for this equation in the group
-%  * push the trial data onto end of \cs{GRP@queue}
-%  * push an hbox onto the front of \cs{GRP@box}
-%    containing: \cs{EQ@box}, \cs{EQ@copy}, \cs{penalty} 1 and \cs{EQ@numbox}
+% \begin{itemize}
+% \item push the trial data onto end of \cs{GRP@queue}.
+% \item push an hbox onto the front of \cs{GRP@box} containing:
+%   \cs{EQ@box}, \cs{EQ@copy}, \cs{penalty} 1 and \cs{EQ@numbox}.
+% \end{itemize}
 % \begin{macro}{\grp@push}
 % 
 % For putting the equation on a queue.   
@@ -5963,8 +6194,7 @@ and the derived files
     \hbox{\box\EQ@box\box\EQ@copy\penalty\@ne\copy\EQ@numbox}%
     \unvbox\GRP@box
   }%
- \global\let\GRP@top\@False
- \EQ@trial
+  \EQ@trial
   \if\eq@isIntertext\else
     \ifdim\eq@wdL>\grp@wdL \global\grp@wdL\eq@wdL \fi
     \ifdim\eq@wdT>\grp@wdT \global\grp@wdT\eq@wdT \fi
@@ -5995,34 +6225,44 @@ and the derived files
 %    \begin{macrocode}
 \def\grp@finish{%
 %  \debug@box\GRP@box
-%  \debugmsg{\GRP@queue: \the\GRP@queue}%
+%  \breqn@debugmsg{\GRP@queue: \the\GRP@queue}%
 %    \end{macrocode}
 % == Now that we know the collective measurements, make final decision
 % about alignment \& shifting.  Check if alignment is still possible
 %    \begin{macrocode}
   \setlength\dim@a{\grp@wdL+\grp@wdR-4em}% Allowance for shrink?
-  \if\grp@aligned\ifdim\dim@a>\grp@linewidth
-     \global\let\grp@aligned\@False     
-  \fi\fi
+  \if\grp@aligned
+    \ifdim\dim@a>\grp@linewidth
+      \global\let\grp@aligned\@False     
+    \fi
+  \fi
 %    \end{macrocode}
 % If we're adding an unshifted group number that equations didn't know
 % about, re-check shifting
 %    \begin{macrocode}
   \addtolength\dim@a{\grp@wdNum }% Effective length
-  \if\grp@shiftnumber\else\if\grp@hasNumber\if\grp@eqs@numbered\else\ifdim\dim@a>\grp@linewidth
-     \global\let\grp@shiftnumber\@True
-  \fi\fi\fi\fi
+  \if\grp@shiftnumber
+  \else
+    \if\@And{\grp@hasNumber}{\@Not\grp@eqs@numbered}
+      \ifdim\dim@a>\grp@linewidth
+        \global\let\grp@shiftnumber\@True
+      \fi
+    \fi
+  \fi
 %    \end{macrocode}
 % If we can still align, total width is sum of maximum LHS \& RHS
 %    \begin{macrocode}
   \if\grp@aligned
-     \global\grp@wdT\grp@wdL\global\advance\grp@wdT\grp@wdR
+     \global\grp@wdT\grp@wdL
+     \global\advance\grp@wdT\grp@wdR
   \fi
-  \debugmsg{======= DGROUP Formatting
-          ^^J||===== \grp@wdL=\the\grp@wdL, \grp@wdR=\the\grp@wdR
-          ^^J||===== Shift Number=\theb@@le\grp@shiftnumber, Eqns. numbered=\theb@@le\grp@eqs@numbered
-          ^^J||===== Aligned=\theb@@le\grp@aligned
-          ^^J||===== \grp@wdNum=\the\grp@wdNum}%
+%<*trace>
+  \breqn@debugmsg{======= DGROUP Formatting
+   \MessageBreak==== \grp@wdL=\the\grp@wdL, \grp@wdR=\the\grp@wdR
+   \MessageBreak==== Shift Number=\theb@@le\grp@shiftnumber, Eqns. numbered=\theb@@le\grp@eqs@numbered
+   \MessageBreak==== Aligned=\theb@@le\grp@aligned
+   \MessageBreak==== \grp@wdNum=\the\grp@wdNum}%
+%</trace>
 %    \end{macrocode}
 % BRM: Originally this stuff was dumped directly, without capturing it
 % in a \cs{vbox}
@@ -6036,9 +6276,17 @@ and the derived files
 % NOTE: For now, just code up LM number
 % NOTE: Come back and handle other cases.
 % NOTE: Vertical spacing is off, perhaps because of inter eqn. glue
+%
+% A bit of a hack to get the top spacing correct. Fix this logic
+% properly some day.  Also, we do the calculation in a group for
+% maximum safety.
 %    \begin{macrocode}
-    \eq@topspace{\vskip\parskip}%
-  \if\grp@hasNumber\if\grp@eqs@numbered\else
+  \global\let\eq@GRP@first@dmath\@True
+  \begingroup
+  \dmath@first@leftskip
+  \eq@topspace{\vskip\parskip}%
+  \endgroup
+  \if\@And{\grp@hasNumber}{\@Not{\grp@eqs@numbered}}%
 %    \eq@topspace{\vskip\parskip}%
     \if\grp@shiftnumber
       \copy\GRP@numbox \penalty\@M
@@ -6049,13 +6297,17 @@ and the derived files
       \setlength\skip@c{\dim@a-\ht\GRP@numbox}%
       \vglue\skip@c% NON discardable
       \copy\GRP@numbox \penalty\@M
-\debugmsg{GROUP NUMBER: preskip:\the\skip@c,  postkern:\the\dim@a, height:\the\ht\GRP@wholebox,
-         ^^J||===== box height:\the\ht\GRP@numbox, box depth:\the\dp\GRP@numbox}%
+%<*trace>
+\breqn@debugmsg{GROUP NUMBER: preskip:\the\skip@c,  postkern:\the\dim@a, height:\the\ht\GRP@wholebox,
+  \MessageBreak==== box height:\the\ht\GRP@numbox, box depth:\the\dp\GRP@numbox}%
+%</trace>
       \kern-\dim@a
       \kern-\abovedisplayskip % To cancel the topspace above the first eqn.
     \fi
-  \fi\fi
+  \fi
+%<*trace>
 %\debug@box\GRP@wholebox
+%</trace>
   \unvbox\GRP@wholebox
   \let\@elt\relax
 %    \end{macrocode}
@@ -6205,12 +6457,14 @@ and the derived files
 \@ifundefined{Mathstrut@}{\let\Mathstrut@\strut}{}
 \def\darray@cr{\Mathstrut@\cr}
 \def\col@box{%
-%\debugmsg{Col \number\cur@row,\number\cur@col: \the\wd\z@\space x \the\ht\z@+\the\dp\z@}%
+%<*trace>
+%\breqn@debugmsg{Col \number\cur@row,\number\cur@col: \the\wd\z@\space x \the\ht\z@+\the\dp\z@}%
+%</trace>
   \unhbox\z@
 }
 \newenvironment{darray}{\@optarg\@darray{}}{}
 \def\@darray[#1]{%
-  \debugmsg{=== DARRAY ==================================================}%
+%<trace>  \breqn@debugmsg{=== DARRAY ==================================================}%
   \if\eq@group\else\eq@prelim\fi
 %    \end{macrocode}
 % Init the halign preamble to empty, then unless the \quoted{cols} key is
@@ -6646,3 +6900,7 @@ and the derived files
 % \item try to use vadjust for keepglue
 %  
 % \end{enumerate}
+%
+% \PrintIndex
+%
+% \Finale
diff --git a/Master/texmf-dist/source/latex/mh/empheq.ins b/Master/texmf-dist/source/latex/mh/empheq.ins
deleted file mode 100644
index c0d42567628..00000000000
--- a/Master/texmf-dist/source/latex/mh/empheq.ins
+++ /dev/null
@@ -1,56 +0,0 @@
-%%
-%% This file will generate fast loadable files and documentation
-%% driver files from the doc files in this package when run through
-%% LaTeX or TeX.
-%%
-%% File `empheq.ins'.
-%% Copyright 2002--2004 Morten H\o gholm.
-%% moho01ab@student.cbs.dk
-%%
-%% It may be distributed and/or modified under the
-%% conditions of the LaTeX Project Public License, either version 1.3
-%% of this license or (at your option) any later version.
-%% The latest version of this license is in
-%%   http://www.latex-project.org/lppl.txt
-%% and version 1.3 or later is part of all distributions of LaTeX
-%% version 2003/12/01 or later.
-%%
-%% This work has the LPPL maintenance status "maintained".
-%%
-%% The Current Maintainer of this work is Morten H\o gholm.
-%%
-%% This work consists of the files empheq.dtx and empheq.ins and the
-%% derived files empheq.sty and ntheorem.fix.
-%%
-%% --------------- start of docstrip commands ------------------
-%%
-\input docstrip
-
-\keepsilent
-
-\preamble
-
-It may be distributed and/or modified under the
-conditions of the LaTeX Project Public License, either version 1.3
-of this license or (at your option) any later version.
-The latest version of this license is in
-  http://www.latex-project.org/lppl.txt
-and version 1.3 or later is part of all distributions of LaTeX
-version 2003/12/01 or later.
-
-This work has the LPPL maintenance status "maintained".
-
-The Current Maintainer of this work is Morten H\string\o gholm.
-
-This work consists of the files empheq.dtx and empheq.ins and the
-derived files empheq.sty and ntheorem.fix
-
-\endpreamble
-
-%%%%%%%%%%%%%%%
-\generate{%
-  \file{empheq.sty}{\from{empheq.dtx}{empheq}}%
-  \file{ntheorem.fix}{\from{empheq.dtx}{ntheorem}}%
-}
-
-\endbatchfile
diff --git a/Master/texmf-dist/source/latex/mh/empheq07.ins b/Master/texmf-dist/source/latex/mh/empheq07.ins
deleted file mode 100644
index c001b4a482c..00000000000
--- a/Master/texmf-dist/source/latex/mh/empheq07.ins
+++ /dev/null
@@ -1,54 +0,0 @@
-%%
-%% This file will generate fast loadable files and documentation
-%% driver files from the doc files in this package when run through
-%% LaTeX or TeX.
-%%
-%% File `empheq07.ins'.
-%% Copyright 2002--2004 Morten H\o gholm.
-%% moho01ab@student.cbs.dk
-%%
-%% It may be distributed and/or modified under the
-%% conditions of the LaTeX Project Public License, either version 1.3
-%% of this license or (at your option) any later version.
-%% The latest version of this license is in
-%%   http://www.latex-project.org/lppl.txt
-%% and version 1.3 or later is part of all distributions of LaTeX
-%% version 2003/12/01 or later.
-%%
-%% This work has the LPPL maintenance status "maintained".
-%%
-%% The Current Maintainer of this work is Morten H\o gholm.
-%%
-%% This work consists of the files empheq07.dtx and empheq07.ins and
-%% the derived file empheq07.sty.
-%% --------------- start of docstrip commands ------------------
-%%
-\input docstrip
-
-\keepsilent
-
-\preamble
-
-It may be distributed and/or modified under the
-conditions of the LaTeX Project Public License, either version 1.3
-of this license or (at your option) any later version.
-The latest version of this license is in
-  http://www.latex-project.org/lppl.txt
-and version 1.3 or later is part of all distributions of LaTeX
-version 2003/12/01 or later.
-
-This work has the LPPL maintenance status "maintained".
-
-The Current Maintainer of this work is Morten H\string\o gholm.
-
-This work consists of the files empheq07.dtx and empheq07.ins and
-the derived file empheq07.sty.
-
-\endpreamble
-
-%%%%%%%%%%%%%%%
-\generate{%
-  \file{empheq07.sty}{\from{empheq07.dtx}{package}}%
-}
-
-\endbatchfile
diff --git a/Master/texmf-dist/source/latex/mh/flexisym.dtx b/Master/texmf-dist/source/latex/mh/flexisym.dtx
index 3ce279e4e82..6aecf24551c 100644
--- a/Master/texmf-dist/source/latex/mh/flexisym.dtx
+++ b/Master/texmf-dist/source/latex/mh/flexisym.dtx
@@ -72,7 +72,7 @@
 \input docstrip.tex
 \Msg{************************************************************************}
 \Msg{* Installation}
-\Msg{* Package: flexisym 2007/12/10 v0.95 Flexisym (MH)}
+\Msg{* Package: flexisym 2007/12/19 v0.96 Flexisym (MH)}
 \Msg{************************************************************************}
 
 \keepsilent
@@ -138,8 +138,11 @@ and the derived files
 %<*driver>
 \NeedsTeXFormat{LaTeX2e}
 \ProvidesFile{flexisym.drv}%
-  [2007/12/10 v0.95 flexisym (MH)]
+  [2007/12/19 v0.96 flexisym (MH)]
 \documentclass{ltxdoc}
+\CodelineIndex
+\EnableCrossrefs
+\setcounter{IndexColumns}{2}
 \providecommand*\pkg[1]{\textsf{#1}}
 \providecommand*\cls[1]{\textsf{#1}}
 \providecommand*\opt[1]{\texttt{#1}}
@@ -159,7 +162,7 @@ and the derived files
 % \fi
 %
 % \title{The \textsf{flexisym} package}
-% \date{2007/12/10 v0.95}
+% \date{2007/12/19 v0.96}
 % \author{Morten H\o gholm \\\texttt{mh.ctan@gmail.com}}
 %
 % \maketitle
@@ -175,7 +178,7 @@ and the derived files
 %
 %    \begin{macrocode}
 %<*package>
-\ProvidesPackage{flexisym}[2007/12/10 v0.95]
+\ProvidesPackage{flexisym}[2007/12/19 v0.96]
 \let\@xp\expandafter \let\@nx\noexpand
 \edef\do{%
   \@nx\AtEndOfPackage{%
@@ -463,15 +466,17 @@ and the derived files
     \fi
   \fi
   \mathcode `\-45 \mathcode `\/47\mathcode `\:"603A\relax 
-}
+}%
 }
 %    \end{macrocode}
 %
 % And we then continue with the options.
 %    \begin{macrocode}
+\DeclareOption{mathstyleoff}{\PassOptionsToPackage{mathactivechars}{mathstyle}}
 \DeclareOption{cmbase}{\usesymbols{cmbase}}
 \DeclareOption{mathpazo}{\usesymbols{mathpazo}}
 \DeclareOption{mathptmx}{\usesymbols{mathptmx}}
+\ExecuteOptions{cmbase}
 \ProcessOptions\relax
 \renewcommand{\lnot}{\neg}
 \renewcommand{\land}{\wedge}
@@ -483,9 +488,7 @@ and the derived files
 \renewcommand{\gets}{\leftarrow}
 \renewcommand{\to}{\rightarrow}
 \renewcommand{\|}{\Vert}
-\@ifpackagewith{flexisym}{mathstyleoff}{}{%
-  \RequirePackage[activechars]{mathstyle}\relax
-}
+\RequirePackage{mathstyle}
 %</package>\endinput
 %    \end{macrocode}
 %
@@ -514,9 +517,9 @@ and the derived files
 % Default mathgroup setup.   
 %    \begin{macrocode}
 %<*cmbase|mathpazo|mathptmx>
-%<cmbase>\ProvidesSymbols{cmbase}[2001/09/07 v0.91]
-%<mathpazo>\ProvidesSymbols{mathpazo}[2007/12/09 v0.1]
-%<mathptmx>\ProvidesSymbols{mathptmx}[2007/12/09 v0.1]
+%<cmbase>\ProvidesSymbols{cmbase}[2007/12/19 v0.92]
+%<mathpazo>\ProvidesSymbols{mathpazo}[2007/12/19 v0.2]
+%<mathptmx>\ProvidesSymbols{mathptmx}[2007/12/19 v0.2]
 \@xp\xdef\csname mg@OT1\endcsname{\hexnumber@\symoperators}
 \@xp\xdef\csname mg@OML\endcsname{\hexnumber@\symletters}
 \@xp\xdef\csname mg@OMS\endcsname{\hexnumber@\symsymbols}
@@ -951,8 +954,9 @@ and the derived files
 % it (which was perhaps true in an older version of
 % \fn{plain.tex}?).   
 %    \begin{macrocode}
-%<cmbase|mathptmx>\newcommand*\joinord{\mkern-3mu }
-%<mathpazo>\newcommand*\joinord{\mkern-3.45mu }
+\providecommand*\joinord{}
+%<cmbase|mathptmx>\renewcommand*\joinord{\mkern-3mu }
+%<mathpazo>\renewcommand*\joinord{\mkern-3.45mu }
 \DeclareFlexCompoundSymbol{\notin}{Rel}{\mathpalette\c@ncel\in}
 \DeclareFlexCompoundSymbol{\rightleftharpoons}{Rel}{\mathpalette\rlh@{}}
 \DeclareFlexCompoundSymbol{\doteq}{Rel}{\buildrel\textstyle.\over=}
@@ -1276,4 +1280,8 @@ and the derived files
 %%\DeclareFlexSymbol{\hbar}         {Ord}{MSB}{7E}
 \DeclareFlexSymbol{\backepsilon}    {Rel}{MSB}{7F}
 %</msabm>
-%    \end{macrocode}
\ No newline at end of file
+%    \end{macrocode}
+%
+% \PrintIndex
+%
+% \Finale
diff --git a/Master/texmf-dist/source/latex/mh/mathstyle.dtx b/Master/texmf-dist/source/latex/mh/mathstyle.dtx
index ca8fede5aed..9c65737aa88 100644
--- a/Master/texmf-dist/source/latex/mh/mathstyle.dtx
+++ b/Master/texmf-dist/source/latex/mh/mathstyle.dtx
@@ -67,7 +67,7 @@
 \input docstrip.tex
 \Msg{************************************************************************}
 \Msg{* Installation}
-\Msg{* Package: mathstyle 2007/12/10 v0.83 Mathstyle (MH)}
+\Msg{* Package: mathstyle 2007/12/19 v0.84 Mathstyle (MH)}
 \Msg{************************************************************************}
 
 \keepsilent
@@ -128,8 +128,11 @@ and the derived files
 %<*driver>
 \NeedsTeXFormat{LaTeX2e}
 \ProvidesFile{mathstyle.drv}%
-  [2007/12/10 v0.83 mathstyle (MH)]
+  [2007/12/19 v0.84 mathstyle (MH)]
 \documentclass{ltxdoc}
+\CodelineIndex
+\EnableCrossrefs
+\setcounter{IndexColumns}{2}
 \providecommand*\pkg[1]{\textsf{#1}}
 \begin{document}
   \DocInput{mathstyle.dtx}
@@ -138,7 +141,7 @@ and the derived files
 % \fi
 %
 % \title{The \textsf{mathstyle} package}
-% \date{2007/12/10 v0.83}
+% \date{2007/12/19 v0.84}
 % \author{Morten H\o gholm \\\texttt{mh.ctan@gmail.com}}
 %
 %
@@ -203,7 +206,7 @@ and the derived files
 %
 %    \begin{macrocode}
 %<*package>
-\ProvidesPackage{mathstyle}[2007/12/10 v0.83]
+\ProvidesPackage{mathstyle}[2007/12/19 v0.84]
 %    \end{macrocode}
 % \begin{macro}{\@saveprimitive}
 %   A straight copy from \pkg{breqn}, see implementation details
@@ -381,6 +384,7 @@ and the derived files
 %    \end{macrocode}
 % Finally, we declare the package options.
 %    \begin{macrocode}
+\DeclareOption{mathactivechars}{\catcode`\^=7\relax \catcode`\_=8\relax }
 \DeclareOption{activechars}{\catcode`\^=13\relax \catcode`\_=13\relax }
 \ProcessOptions\relax
 \ifnum\catcode`\^=13\relax
@@ -393,4 +397,7 @@ and the derived files
 \fi
 %</package>
 %    \end{macrocode}
+%
+% \PrintIndex
+%
 % \Finale
diff --git a/Master/texmf-dist/source/latex/mh/mathtools.ins b/Master/texmf-dist/source/latex/mh/mathtools.ins
deleted file mode 100644
index 5b541376b07..00000000000
--- a/Master/texmf-dist/source/latex/mh/mathtools.ins
+++ /dev/null
@@ -1,54 +0,0 @@
-%%
-%% This file will generate fast loadable files and documentation
-%% driver files from the doc files in this package when run through
-%% LaTeX or TeX.
-%%
-%% File `mathtools.ins'.
-%% Copyright 2004 Morten H\o gholm.
-%% moho01ab@student.cbs.dk
-%%
-%% It may be distributed and/or modified under the
-%% conditions of the LaTeX Project Public License, either version 1.3
-%% of this license or (at your option) any later version.
-%% The latest version of this license is in
-%%   http://www.latex-project.org/lppl.txt
-%% and version 1.3 or later is part of all distributions of LaTeX
-%% version 2003/12/01 or later.
-%%
-%% This work has the LPPL maintenance status "maintained".
-%%
-%% The Current Maintainer of this work is Morten H\o gholm.
-%%
-%% This work consists of the files mathtools.dtx and mathtools.ins
-%% and the derived file mathtools.sty.
-%% --------------- start of docstrip commands ------------------
-%%
-\input docstrip
-
-\keepsilent
-
-\preamble
-
-It may be distributed and/or modified under the
-conditions of the LaTeX Project Public License, either version 1.3
-of this license or (at your option) any later version.
-The latest version of this license is in
-  http://www.latex-project.org/lppl.txt
-and version 1.3 or later is part of all distributions of LaTeX
-version 2003/12/01 or later.
-
-This work has the LPPL maintenance status "maintained".
-
-The Current Maintainer of this work is Morten H\string\o gholm.
-
-This work consists of the files mathtools.dtx and mathtools.ins
-and the derived file mathtools.sty.
-
-\endpreamble
-
-%%%%%%%%%%%%%%%
-\generate{%
-  \file{mathtools.sty}{\from{mathtools.dtx}{package}}%
-}
-
-\endbatchfile
diff --git a/Master/texmf-dist/source/latex/mh/mhsetup.ins b/Master/texmf-dist/source/latex/mh/mhsetup.ins
deleted file mode 100644
index 25c5e2d7395..00000000000
--- a/Master/texmf-dist/source/latex/mh/mhsetup.ins
+++ /dev/null
@@ -1,54 +0,0 @@
-%%
-%% This file will generate fast loadable files and documentation
-%% driver files from the doc files in this package when run through
-%% LaTeX or TeX.
-%%
-%% File `mhsetup.ins'.
-%% Copyright 2004 Morten H\o gholm.
-%% moho01ab@student.cbs.dk
-%%
-%% It may be distributed and/or modified under the
-%% conditions of the LaTeX Project Public License, either version 1.3
-%% of this license or (at your option) any later version.
-%% The latest version of this license is in
-%%   http://www.latex-project.org/lppl.txt
-%% and version 1.3 or later is part of all distributions of LaTeX
-%% version 2003/12/01 or later.
-%%
-%% This work has the LPPL maintenance status "maintained".
-%%
-%% The Current Maintainer of this work is Morten H\o gholm.
-%%
-%% This work consists of the files mhsetup.dtx and mhsetup.ins and
-%% the derived file mhsetup.sty.
-%% --------------- start of docstrip commands ------------------
-%%
-\input docstrip
-
-\keepsilent
-
-\preamble
-
-It may be distributed and/or modified under the
-conditions of the LaTeX Project Public License, either version 1.3
-of this license or (at your option) any later version.
-The latest version of this license is in
-  http://www.latex-project.org/lppl.txt
-and version 1.3 or later is part of all distributions of LaTeX
-version 2003/12/01 or later.
-
-This work has the LPPL maintenance status "maintained".
-
-The Current Maintainer of this work is Morten H\string\o gholm.
-
-This work consists of the files mhsetup.dtx and mhsetup.ins and
-the derived file mhsetup.sty.
-
-\endpreamble
-
-%%%%%%%%%%%%%%%
-\generate{%
-  \file{mhsetup.sty}{\from{mhsetup.dtx}{package}}%
-}
-
-\endbatchfile
diff --git a/Master/texmf-dist/tex/latex/mh/breqn.sty b/Master/texmf-dist/tex/latex/mh/breqn.sty
index e69a67473b5..fd4893e5734 100644
--- a/Master/texmf-dist/tex/latex/mh/breqn.sty
+++ b/Master/texmf-dist/tex/latex/mh/breqn.sty
@@ -28,19 +28,18 @@
 %%    breqn.sty, breqn.pdf, breqn.ins, breqn.drv.
 %% 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{breqn}[2007/12/10 v0.96]
+\ProvidesPackage{breqn}[2007/12/22 v0.97a]
 \edef\breqnpopcats{%
   \catcode\number`\"=\number\catcode`\"
   \relax}
 \AtEndOfPackage{\breqnpopcats}%
 \catcode`\^=7 \catcode`\_=8 \catcode`\"=12 \relax
-\DeclareOption{debug}{\errorcontextlines=2000\relax}
 \DeclareOption{mathstyleoff}{%
   \PassOptionsToPackage{mathstyleoff}{flexisym}%
 }
 \ProcessOptions\relax
 \@ifpackageloaded{flexisym}{}{%
-  \RequirePackage[cmbase]{flexisym}[2007/12/10]
+  \RequirePackage{flexisym}[2007/12/19]
     \edef\breqnpopcats{\breqnpopcats
     \catcode\number`\^=\number\catcode`\^
     \catcode\number`\_=\number\catcode`\_
@@ -168,35 +167,6 @@
 \@saveprimitive\vadjust\@@vadjust
 \@saveprimitive\insert\@@insert
 \@saveprimitive\mark\@@mark
-\let\debug=\begingroup
-\let\gubed=\endgroup
-\def\debugmsg{\message{||= \iffalse}\fi
-  \@xp\@gobble\string
-}
-\def\debugwr#1{\immediate\write\sixt@@n{||= #1}}
-\def\debug@box#1{%
-  \batchmode{\showboxbreadth\maxdimen\showboxdepth99\showbox#1}%
-  \errorstopmode
-}
-\def\eqinfo{%
-  \debug@box\EQ@copy
-  \wlog{!! EQ@copy: \the\wd\EQ@copy\space x
-    \the\ht\EQ@copy+\the\dp\EQ@copy
-  }%
-}
-\def\debug@para{%
-  \debugwr{\hsize\the\hsize, \parfillskip\the\parfillskip}%
-  \debugmsg{\leftskip\the\leftskip, \rightskip\the\rightskip}%
-  \debugmsg{\linepenalty\the\linepenalty, \adjdemerits\the\adjdemerits}%
-  \debugmsg{\pretolerance\the\pretolerance, \tolerance\the\tolerance,
-    \parindent\the\parindent}%
-}
-\@ifpackagewith{breqn}{debug}{}{%
-  \let\debug\relax \let\gubed\relax
-  \let\debugmsg\@gobble \let\debug@lines\relax \let\debug@para\relax
-  \let\debugwr\@gobble
-  \let\debug@box\@gobble \let\debug@push\@gobbletwo
-}
 \@ifundefined{listwidth}{\newdimen\listwidth}{}
 \listwidth=\z@
 \def\eqfontsize{}         % Inherit from context    [NOT USED?]
@@ -409,6 +379,8 @@
   \setlength\eq@given@sidespace{#1}%
 }
 \define@key{breqn}{style}{\eqstyle\@xp{\the\eqstyle #1}}
+\define@key{breqn}{shortskiplimit}{\def\eq@shortskiplimit{#1}}
+\def\eq@shortskiplimit{2em}
 \define@key{breqn}{frame}[\fboxrule]{\def\eq@frame{T}%
   \dim@a#1\relax\edef\eq@framewd{\the\dim@a}%
   \freeze@glue\eqlinespacing \freeze@glue\eqlineskip
@@ -437,16 +409,9 @@
 \define@key{breqn}{cols}{\global\let\@preamble\@empty
   \darray@mkpream#1\@percentchar
 }
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%BRM: The following incorporates several changes:
-%%  1) modifications supplied by MJD to fix the eaten \cs{paragraph} problem.
-%%  2) Added \cs{display@setup} here, rather than globally.
 \newenvironment{dmath}{%
  \let\eq@hasNumber\@True \@optarg\@dmath{}}{}
 \def\@dmath[#1]{%
-  \debugmsg{=== DMATH ==================================================}%
   \everydisplay\expandafter{\the\everydisplay \display@setup}%
   \if@noskipsec \leavevmode \fi
   \if@inlabel \leavevmode \global\@inlabelfalse \fi
@@ -507,7 +472,6 @@
  % This sets up numbox, etc, even if unnumbered?????
     \ifx\eq@number\@empty
     \else
-      \debugmsg{Number \eq@number}%
       \set@label{equation}\eq@number
       \global\sbox\EQ@numbox{%
         \next@label \global\let\next@label\@empty
@@ -517,23 +481,36 @@
     \fi
   \fi
 }
+\newcount\eq@final@linecount
+\let\eq@GRP@first@dmath\@True
 \def\eq@finish{%
   \begingroup
-    \debugmsg{Formatting equation}%
-    \debug@showmeasurements
     \if F\eq@frame\else
       \freeze@glue\eqlinespacing \freeze@glue\eqlineskip
     \fi
     \csname eq@\eqindent @setsides\endcsname % Compute \leftskip,\rightskip
     \adjust@parshape\eq@parshape% Final adjustment of parshape for left|right skips
-    \eq@topspace{\vskip\parskip}% Set top spacing
-    \debug@showformat
-    % Now, invoke the appropriate typesetter according to number placement
+    \if\eq@group
+      \if\eq@GRP@first@dmath
+        \global\let\eq@GRP@first@dmath\@False
+        \xdef\dmath@first@leftskip{\leftskip=\the\leftskip\relax}%
+      \else
+        \eq@topspace{\vskip\parskip}% Set top spacing
+      \fi
+    \else
+      \eq@topspace{\vskip\parskip}% Set top spacing
+    \fi
+    \afterassignment\remove@to@nnil
+    \eq@final@linecount=\expandafter\@gobble\eq@parshape\@nnil
     \if\eq@hasNumber
       \if\eq@shiftnumber
         \csname eq@typeset@\eqnumside Shifted\endcsname
       \else
-        \csname eq@typeset@\eqnumside\eqnumplace\endcsname
+        \ifnum\eq@final@linecount=\@ne
+          \csname eq@typeset@\eqnumside @single\endcsname
+        \else
+          \csname eq@typeset@\eqnumside\eqnumplace\endcsname
+        \fi
       \fi
     \else
       \eq@typeset@Unnumbered
@@ -541,6 +518,31 @@
   \endgroup
   \eq@botspace
 }
+\def\eq@typeset@L@single{%
+  \nobreak
+  \eq@params\eq@parshape
+  \nointerlineskip\noindent
+  \add@grp@label
+  \rlap{\kern-\leftskip\box\EQ@numbox}%
+  \if F\eq@frame
+  \else
+    \rlap{\raise\eq@firstht\hbox to\z@{\eq@addframe\hss}}%
+  \fi
+  \eq@dump@box\unhbox\EQ@box \@@par
+}
+\def\eq@typeset@R@single{%
+  \nobreak
+  \eq@params\eq@parshape
+  \nointerlineskip\noindent
+  \add@grp@label
+  \if F\eq@frame
+  \else
+    \rlap{\raise\eq@firstht\hbox to\z@{\eq@addframe\hss}}%
+  \fi
+  \rlap{\kern-\leftskip\kern\linewidth\kern-\wd\EQ@numbox\copy\EQ@numbox}%
+  \eq@dump@box\unhbox\EQ@box
+  \@@par
+}
 \def\peek@branch#1#2{%
   \let\peek@b#1\let\peek@space#2\futurelet\@let@token\peek@a
 }
@@ -576,6 +578,7 @@
   \else\ifx\@let@token ;\@nx\check@qed
   \else\ifx\@let@token ?\@nx\check@qed
   \else\ifx\@let@token !\@nx\check@qed
+  \else\@nx\finish@end
   \fi\fi\fi\fi\fi
 }
 \xdef\check@punct@b{%
@@ -613,8 +616,8 @@
 \def\eq@topspace#1{%
   \begingroup
     \global\let\EQ@shortskips\@False
-    \if\@And{\eq@group}{\@Not\GRP@top}%
-      \parskip\intereqskip \penalty\intereqpenalty
+    \if\@And{\eq@group}{\@Not\eq@GRP@first@dmath}%
+        \parskip\intereqskip \penalty\intereqpenalty
     \else
       \eq@check@shortskip
       \if\EQ@shortskips
@@ -629,27 +632,35 @@
     \else
       \addtolength\parskip{\eq@framesep+\eq@framewd}%
     \fi
-\debugmsg{Topspace: \theb@@le\EQ@shortskips, \parskip=\the\parskip, \predisplaysize=\the\predisplaysize}%
     #1%
   \endgroup
 }
-\def\eq@check@shortskip{%
+\def\eq@check@shortskip {%
   \global\let\EQ@shortskips\@False
   \setlength\dim@a{\abovedisplayskip+\ht\EQ@numbox}%
-  \addtolength\leftskip{-2em}% standard TeX value
   \ifdim\leftskip<\predisplaysize
-  \else\if R\eqnumside  \global\let\EQ@shortskips\@True
-  \else\if\eq@shiftnumber
-  \else\if T\eqnumplace
-    \ifdim\dim@a<\eq@firstht
-      \global\let\EQ@shortskips\@True
-    \fi
   \else
-    \setlength\dim@b{\eq@vspan/2}%
-    \ifdim\dim@a<\dim@b
-      \global\let\EQ@shortskips\@True
+    \ifdim -\maxdimen=\predisplaysize
+    \else
+      \if R\eqnumside
+        \global\let\EQ@shortskips\@True
+      \else
+        \if\eq@shiftnumber
+        \else
+          \if T\eqnumplace
+            \ifdim\dim@a<\eq@firstht
+              \global\let\EQ@shortskips\@True
+            \fi
+          \else
+            \setlength\dim@b{\eq@vspan/2}%
+            \ifdim\dim@a<\dim@b
+              \global\let\EQ@shortskips\@True
+            \fi
+          \fi
+        \fi
+      \fi
     \fi
-  \fi\fi\fi\fi
+  \fi
 }
 \def\eq@botspace{%
   \penalty\postdisplaypenalty
@@ -681,8 +692,6 @@
   \global\let\EQ@prebin@space\relax
   \binoppenalty\@M \relpenalty\@M
 }
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \newdimen\eq@wdR\eq@wdR\z@%BRM
 \def\eq@capture{%
   \ifnum\lastpenalty>-\@M \penalty-\@Mi \fi
@@ -706,14 +715,10 @@
     % Apparently missing a \thickmuskip = 5mu = 5/18em=0.27777777777.. ?
        + 0.2777777777777em}% FUDGE??!?!?!
     \ifdim\dim@a>\eq@wdL
-      \debugmsg{Correcting LHS from \the\eq@wdL\space to \the\dim@a = \the\wd\EQ@box - \the\eq@wdR}%
       \eq@wdL\dim@a
       \xdef\EQ@setwdL{\eq@wdL\the\eq@wdL\relax}%
     \fi
   \fi
-  \debugmsg{Capture: total length=\the\wd\EQ@box
-           ^^J||===== has LHS=\theb@@le\EQ@hasLHS, \eq@wdL=\the\eq@wdL, \eq@wdR=\the\eq@wdR,
-           ^^J||===== \eq@wdCond=\the\eq@wdCond}%
   \egroup % end vbox started earlier
 }
 \def\eq@addpunct{%
@@ -842,28 +847,6 @@
   \endgroup
   \EQ@trial
 }
-\def\debug@showmeasurements{%
-  \debugmsg{=> \number\eq@lines\space lines}%
-  \debug
-  \def\@elt##1^^J##2{^^J||===== \space\space##1/##2}%
-  \let\@endelt\@empty
-  \debugmsg{=> trial info:\eq@measurements}%
-  \debugmsg{=> bounding box: \the\eq@wdT x\the\eq@vspan, badness=\the\eq@badness}%
-  \let\@elt\relax \let\@endelt\relax
-  \gubed
-}
-\def\debug@showmeasurements{%
-  \begingroup
-  \def\@elt##1^^J##2{^^J||=====   ##1/##2}%
-  \let\@endelt\@empty
-  \debugmsg{===> Measurements: \number\eq@lines\space lines
-           \eq@measurements
-           ^^J||===== bounding box: \the\eq@wdT x\the\eq@vspan, badness=\the\eq@badness
-           ^^J||===== \leftskip=\the\leftskip, \rightskip=\the\rightskip}%
- \endgroup
-}
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \let\EQ@trial\@empty
 \newtoks\EQ@continue
 \let\EQ@widths\@empty
@@ -882,33 +865,29 @@
   \if T\eq@frame \eq@frame@adjust\dim@c \fi
   \ifdim\dim@c>\eq@linewidth
     \eq@linewidth\dim@c
-    \debugmsg{Choose Shape for width(#1)=\the\eq@linewidth}%
     \let\eq@trial@b\eq@trial@d
     \csname eq@try@layout@\eq@layout\endcsname
-  \else
-    \debugmsg{Next width (#1) is shorter; skip it}%
   \fi
   \edef\eq@linewidths{\iffalse}\fi
 }
 \def\eq@frame@adjust#1{%
-  \addtolength#1{-2\eq@framewd-2\eq@framesep}%
+  %\addtolength#1{-2\eq@framewd-2\eq@framesep}%
+  \dim@a\eq@framewd \advance\dim@a\eq@framesep
+  \advance#1-2\dim@a
 }
 \def\eq@trial@succeed{%
   \aftergroup\@gobbletwo % cancel the \EQ@fallback code; see \eq@trial@c (?)
   \global\EQ@continue{\eq@trial@done}%
 }
 \def\eq@trial@done{%
-  \debugmsg{End trial: Success!}%
   \let\eq@failout\relax
 }
 \def\eq@trial@init{\global\let\EQ@fallback\eq@nextlayout}
 \def\eq@nextlayout#1{%
   \endgroup
-  \debugmsg{Nope ... that ain't gonna work.}%
   \begingroup #1%
 }
 \def\eq@failout{%
-\debugmsg{End trial: failout}%
   \global\let\EQ@trial\EQ@last@trial
 }
 \def\eq@trial@save#1{%
@@ -934,7 +913,6 @@
 }
 \def\eq@trial@b{\eq@trial@c}
 \def\eq@trial@c#1#2{%
-  \debugmsg{Trying layout "#1" with^^J||===== parshape\space\@xp\@gobble\@parshape}%
   \begingroup
   \eq@trial@init
   \def\eq@layout{#1}%
@@ -959,9 +937,7 @@
 }
 \def\eq@trial@d#1#2{\eq@trial@c{#1}{}}
 \def\eq@check@density{%
-  \debugmsg{Checking density for layout L}%
   \if\@Or{\@Not\EQ@hasLHS}{\eq@shortLHS}%
-    \debugmsg{Density check: No LHS, or is short; OK}%
     \eq@trial@succeed
   \else\if\eq@dense@enough
     \eq@trial@succeed
@@ -981,7 +957,6 @@
   \eq@ml@record@indents
   \eq@measure@lines
   \eq@recalc
-  \debug@showmeasurements
 }
 \let\adjust@rel@penalty\@empty
 \def\eq@fix@lastline{%
@@ -1000,16 +975,14 @@
   \let\@elt\eq@recalc@b
   \@elt#1x#2+#3\@endelt
 }
-\def\eq@recalc@b#1^^J#2,#3x#4+#5@#6\@endelt{%
+\def\eq@recalc@b#1X#2,#3x#4+#5@#6\@endelt{%
   \setlength\dim@a{#2+#3}%
   \ifdim\dim@a>\eq@wdT \eq@wdT\dim@a \fi
   \ifdim\dim@a<\eq@wdMin \eq@wdMin\dim@a \fi
   \eq@dp#5\relax
-  \addtolength\eq@vspan{#1+#4+#5}%
+  \addtolength\eq@vspan{#1+#4+\eq@dp}%
   \ifnum#6>\eq@badness \eq@badness#6\relax\fi
 }
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \def\eq@layout{?}
 \@namedef{eq@try@layout@?}{%
   \let\eq@trial@b\eq@trial@c
@@ -1022,34 +995,27 @@
     \else\if\grp@hasNumber\addtolength\dim@b{-\wd\GRP@numbox-\eqnumsep}%
   \fi\fi\fi\fi
   \ifdim\dim@a<\dim@b% Do we even have a chance of fitting to one line?
-    \debugmsg{Choose Shape: (\the\wd\EQ@copy) may fit in \the\dim@b}%
-    % assuming it might fit, don't push too hard
     \setlength\dim@b{\columnwidth-\dim@a+\eq@wdCond}%
     \rightskip\z@\@plus\dim@b\@minus\hfuzz
     \eq@trial@b{i}{\eq@try@layout@multi}%
   \else
-    \debugmsg{Choose Shape: Too long (\the\wd\EQ@copy) for one line (free width=\the\dim@b)}%
    \eq@try@layout@multi
   \fi
 }
 \def\eq@try@layout@multi{%
   \if\EQ@hasLHS
     \ifdim\eq@wdL>\eq@linewidth
-       \debugmsg{Choose Shape: LHS \the\eq@wdL > linewidth}%
        \setlength\dim@a{\wd\EQ@copy-\eq@wdL}%
        \ifdim\dim@a<.25\eq@linewidth \eq@try@layout@S
        \else \eq@try@layout@l
        \fi
     % BRM: Originally .7: Extreme for L since rhs has to wrap within the remaining 30+%!
     \else\ifdim\eq@wdL>.50\eq@linewidth
-      \debugmsg{Choose Shape: LHS (\the\eq@wdL) > .50 linewidth (linewidth=\the\eq@linewidth)}%
       \eq@try@layout@D
     \else
-      \debugmsg{Choose Shape: LHS (\the\eq@wdL) not extraordinarily wide}%
       \eq@try@layout@L
     \fi\fi
   \else
-    \debugmsg{Choose Shape: No LHS here}%
     \eq@try@layout@S % (already checked case i)
   \fi
 }
@@ -1107,10 +1073,8 @@
 \let\eq@shiftnumber\@False
 \def\eq@retry@with@number{%
  \if\eq@shiftnumber
-   \debugmsg{Place number: Shifted number requested}%
  \else
     \ifdim\eq@wdCond>\z@\if R\eqnumside
-      \debugmsg{Place number: Condition w/Right number => Shift number}%
       \let\eq@shiftnumber\@True
     \fi\fi
     \dim@b\eq@wdNum
@@ -1123,13 +1087,10 @@
     \int@a\@ne\if\eq@group\int@a\maxint\fi
     \if\eq@shiftnumber               % Already know we need to shift
     \else\ifdim\eq@wdT<\dim@a % Fits!
-      \debugmsg{Place number: eqn and number fit together}%
     \else
       \setlength\leftskip{\eq@wdNum}%
       \setlength\rightskip{\z@\@plus\dim@a}%
       \adjust@parshape\@parshape
-      \debugmsg{Place number: Try with \leftskip=\the\leftskip, \rightskip=\the\rightskip,
-                ^^J||===== parshape\space\@xp\@gobble\@parshape}%
       \nointerlineskip
       \edef\eq@prev@lines{\the\eq@lines}%
       \edef\eq@prev@badness{\the\eq@badness}% BRM
@@ -1137,16 +1098,12 @@
       \int@a\eq@prev@badness\relax\advance\int@a 50\relax%?
       \int@b\eq@prev@lines  \if\eq@group\advance\int@b\@ne\fi% Allow 1 extra line in group
       \ifnum\eq@lines>\int@b % \eq@prev@lines
-        \debugmsg{Adjustment causes more breaks => Shift number}%
         \let\eq@shiftnumber\@True
       \else\if\eq@badline
-        \debugmsg{Adjustment causes bad lines (\the\eq@badness) => Shift}%
         \let\eq@shiftnumber\@True
       \else\ifnum\eq@badness>\int@a % BRM: New case
-        \debugmsg{Adjustment is badder than previous (\the\eq@badness >> \eq@prev@badness) => Shift}%
         \let\eq@shiftnumber\@True
       \else
-        \debugmsg{Adjustment succeeded}%
       \fi\fi%\fi
    \fi\fi\fi
    \if\eq@shiftnumber
@@ -1206,7 +1163,6 @@
 }
 \def\eq@ml@a{%
   \setbox\tw@\hbox{\unhbox\z@ \unskip}% find natural width
-  \debug\ifnum\eq@badness<\inf@bad\else\debugmsg{!?! Overfull: \the\wd\tw@ >\the\dim@b}\fi\gubed
   \ifdim\dim@b<\wd\tw@ \setlength\dim@a{\dim@b}% shrunken line
   \else                \setlength\dim@a{\wd\tw@}% OK to use natural width
   \fi
@@ -1223,7 +1179,7 @@
     }%
   \fi
   \edef\eq@measurements{\@elt
-    \the\skip@a\space^^J% extra space to facilitate extracting only the
+    \the\skip@a\space X% extra space to facilitate extracting only the
                         % dimen part later
     \csname eq@i%
       \ifnum\eq@curline<\parshape \number\eq@curline
@@ -1241,11 +1197,9 @@
 }
 \def\eq@dense@enough{%
   \ifnum\eq@lines<\thr@@
-    \debugmsg{Density check: less than 3 lines; OK}%
     \@True
   \else
     \ifdim\eq@wdL >.7\eq@wdT
-     \debugmsg{Density check: LHS too long; NOT OK}%
       \@False
     \else \@xp\@xp\@xp\eq@dense@enough@a
     \fi
@@ -1262,18 +1216,16 @@
   \else
     \dim@b\z@ \let\@elt\eq@delt \eq@measurements
     \dim@c\eq@density@factor\eq@wdT \multiply\dim@c\eq@lines
-    \debugmsg{Density check: black \the\dim@b/\eq@density@factor total \the\dim@c}%
     \ifdim\dim@b>\dim@c \true@false@true \else \false@false@false \fi
   \fi
 }
-\def\eq@delt#1^^J#2,#3x#4+#5@#6\@endelt{\addtolength\dim@b{#3}}%
+\def\eq@delt#1X#2,#3x#4+#5@#6\@endelt{\addtolength\dim@b{#3}}%
 \def\eq@dense@enough@b{%
   \int@b\eq@wdT \divide\int@b\p@
   \dim@b\eq@wdL \divide\dim@b\int@b
   \dim@c\eq@lines\p@ \multiply\dim@c\f@ur
   \int@b\eq@lines \multiply\int@b 9 \advance\int@b -10%
   \divide\dim@c\int@b
-  \debugmsg{Density check: l/t \the\dim@b\space< \the\dim@c\space 4n/(9n-10)?}%
   \ifdim\dim@b<\dim@c \true@true@true \else \false@true@false \fi
 }
 \let\eq@parshape\@empty
@@ -1291,16 +1243,12 @@
   \if L\eq@layout \box\tw@ \else\unhbox\tw@\fi
   \adjust@rel@penalty \unhbox\f@ur
 }
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \def\eq@typeset@Unnumbered{%
   \eq@typeset@frame
   \eq@typeset@equation
 }
 \def\eq@typeset@LM{%
-  \addtolength\dim@a{(\eq@vspan+\ht\EQ@numbox-\dp\EQ@numbox)/2}%
+  \setlength\dim@a{(\eq@vspan+\ht\EQ@numbox-\dp\EQ@numbox)/2}%
   \eq@typeset@leftnumber
   \eq@typeset@frame
   \eq@typeset@equation
@@ -1323,7 +1271,7 @@
   \eq@typeset@equation
 }
 \def\eq@typeset@RM{%
-  \setlength\dim@a{(\eq@vspan+\ht\EQ@numbox-\dp\EQ@numbox)/2}
+  \setlength\dim@a{(\eq@vspan+\ht\EQ@numbox-\dp\EQ@numbox)/2}%
   \eq@typeset@rightnumber
   \eq@typeset@frame
   \eq@typeset@equation
@@ -1347,22 +1295,6 @@
   \parskip\dim@a
   \hbox to\hsize{\hfil\copy\EQ@numbox}\@@par%
 }
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\def\debug@showformat{%
-  \debugmsg{Formatting Layout:\eq@layout\space Center/indent: \eqindent\space Number placement \eqnumside\eqnumplace:
-           ^^J||===== \eq@linewidth=\the\eq@linewidth, \@totalleftmargin=\the\@totalleftmargin,
-           ^^J||===== Centered Lines=\theb@@le\eq@centerlines, Shift Number=\theb@@le\eq@shiftnumber,
-           ^^J||===== \eq@wdT=\the\eq@wdT, \eq@wdMin=\the\eq@wdMin,
-           ^^J||===== LHS=\theb@@le\EQ@hasLHS: \eq@wdL=\the\eq@wdL,
-           ^^J||===== \eq@firstht=\the\eq@firstht, \eq@vspan=\the\eq@vspan
-           ^^J||===== \eq@wdNum=\the\eq@wdNum
-           ^^J||===== \eq@wdCond=\the\eq@wdCond, \conditionsep=\the\conditionsep,
-           ^^J||===== \leftskip=\the\leftskip, \rightskip=\the\rightskip,
-           ^^J||===== \abovedisplayskip=\the\abovedisplayskip,
-           ^^J||===== \belowdisplayskip=\the\belowdisplayskip
-           ^^J||===== parshape=\eq@parshape}%
-}
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \def\eq@C@setsides{%
   % \dim@c = space for number, if any, and not shifted.
   \dim@c\z@
@@ -1410,7 +1342,8 @@
   \setlength\dim@e{\eq@wdT-\eq@wdMin}\dim@d=\z@
   \dim@d\z@
   \if\eq@centerlines
-    \divide\dim@e2\relax\dim@d\dim@e
+    \divide\dim@e2\relax
+    \dim@d=\dim@e
   \fi
   \setlength\leftskip{\dim@a\@plus\dim@d}%
   \addtolength\dim@e{\dim@c}%
@@ -1421,10 +1354,14 @@
   \if F\eq@frame\else
     \dim@b\dim@c
   \fi
-  \if\eq@hasNumber\if\eq@shiftnumber\else\if R\eqnumside
-    \dim@c\eq@wdNum
-    \ifdim\dim@c>\dim@b\dim@b\dim@c\fi
-  \fi\fi\fi
+  \if\@And{\eq@hasNumber}{\@Not{\eq@shiftnumber}}%
+    \if R\eqnumside
+      \dim@c\eq@wdNum
+      \ifdim\dim@c>\dim@b
+        \dim@b\dim@c
+      \fi
+    \fi
+  \fi
   % If either of those cases requires hard rightskip, move that part from glue.
   \ifdim\dim@b>\z@
     \addtolength\dim@e{-\dim@c}%
@@ -1432,35 +1369,35 @@
   \fi
   % And peculiar further special case: in indented environs, width isn't where it would seem
   \ifdim\eq@wdCond>\z@
-     \addtolength\rightskip{-\@totalleftmargin}%
+    \addtolength\rightskip{-\@totalleftmargin}%
   \fi
   \parfillskip\z@skip
 }
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \def\eq@I@setsides{%
-  % Leftskip is normally just the requested indentation
   \leftskip\mathindent
-  % But move left, if shifted number presumably because of clashed w/ number?
   \if\eq@shiftnumber
     \setlength\dim@a{\eq@linewidth-\eq@wdT-\mathindent}%
     \ifdim\dim@a<\z@
       \leftskip=\z@ % Or something minimal?
-  \fi\fi
-  % Push gently from right.
+    \fi
+  \fi
   \dim@a=\z@
   \setlength\dim@b{\eq@linewidth-\leftskip-\eq@wdMin}%
-  % Special case: if framing be much more rigid(?)
-  \if F\eq@frame\else
+  \if F\eq@frame
+  \else
     \setlength\dim@a{\eq@linewidth-\leftskip-\eq@wdT}
     \addtolength\dim@b{-\dim@a}%
   \fi
   % Or force the space for right number, if needed
-  \if\eq@hasNumber\if\eq@shiftnumber\else\if R\eqnumside
-    \dim@c=\eq@wdNum
-    \if\dim@c>\dim@a
-      \addtolength\dim@b{-\dim@c}%
-      \dim@a=\dim@c
-  \fi\fi\fi\fi
+  \if\@And{\eq@hasNumber}{\@Not{\eq@shiftnumber}}%
+    \if R\eqnumside
+      \dim@c=\eq@wdNum
+      \if\dim@c>\dim@a
+        \addtolength\dim@b{-\dim@c}%
+        \dim@a=\dim@c
+      \fi
+    \fi
+  \fi
   \setlength\rightskip{\dim@a\@plus\dim@b \@minus\hfuzz }%\hfuzz\z@
   \parfillskip\z@skip
 }
@@ -1756,7 +1693,6 @@
 \let\grp@hasNumber\@False
 \let\grp@eqs@numbered\@False
 \let\grp@aligned\@True
-\global\let\GRP@top\@True
 \newenvironment{dgroup}{%
   \let\grp@hasNumber\@True\@optarg\@dgroup{}%
 }{%
@@ -1769,8 +1705,7 @@
   \end@dgroup
 }
 \def\@dgroup[#1]{%
-  \debugmsg{=== DGROUP ==================================================}%
-  \let\eq@group\@True \global\let\GRP@top\@True
+  \let\eq@group\@True \global\let\eq@GRP@first@dmath\@True
   \global\GRP@queue\@emptytoks \global\setbox\GRP@box\box\voidb@x
   \global\let\GRP@label\@empty
   \global\grp@wdL\z@\global\grp@wdR\z@\global\grp@wdT\z@
@@ -1807,7 +1742,6 @@
   \setcounter{parentequation}{\value{equation}}%
   \setcounter{equation}{0}%
   \def\theequation{\theparentequation\alph{equation}}%
-  \debugmsg{Group Number \theequation}%
 }
 \def\grp@resetnumber{%
   \setcounter{equation}{\value{parentequation}}%
@@ -1822,8 +1756,7 @@
     \hbox{\box\EQ@box\box\EQ@copy\penalty\@ne\copy\EQ@numbox}%
     \unvbox\GRP@box
   }%
- \global\let\GRP@top\@False
- \EQ@trial
+  \EQ@trial
   \if\eq@isIntertext\else
     \ifdim\eq@wdL>\grp@wdL \global\grp@wdL\eq@wdL \fi
     \ifdim\eq@wdT>\grp@wdT \global\grp@wdT\eq@wdT \fi
@@ -1841,27 +1774,34 @@
 }
 \def\grp@finish{%
   \setlength\dim@a{\grp@wdL+\grp@wdR-4em}% Allowance for shrink?
-  \if\grp@aligned\ifdim\dim@a>\grp@linewidth
-     \global\let\grp@aligned\@False
-  \fi\fi
+  \if\grp@aligned
+    \ifdim\dim@a>\grp@linewidth
+      \global\let\grp@aligned\@False
+    \fi
+  \fi
   \addtolength\dim@a{\grp@wdNum }% Effective length
-  \if\grp@shiftnumber\else\if\grp@hasNumber\if\grp@eqs@numbered\else\ifdim\dim@a>\grp@linewidth
-     \global\let\grp@shiftnumber\@True
-  \fi\fi\fi\fi
+  \if\grp@shiftnumber
+  \else
+    \if\@And{\grp@hasNumber}{\@Not\grp@eqs@numbered}
+      \ifdim\dim@a>\grp@linewidth
+        \global\let\grp@shiftnumber\@True
+      \fi
+    \fi
+  \fi
   \if\grp@aligned
-     \global\grp@wdT\grp@wdL\global\advance\grp@wdT\grp@wdR
+     \global\grp@wdT\grp@wdL
+     \global\advance\grp@wdT\grp@wdR
   \fi
-  \debugmsg{======= DGROUP Formatting
-          ^^J||===== \grp@wdL=\the\grp@wdL, \grp@wdR=\the\grp@wdR
-          ^^J||===== Shift Number=\theb@@le\grp@shiftnumber, Eqns. numbered=\theb@@le\grp@eqs@numbered
-          ^^J||===== Aligned=\theb@@le\grp@aligned
-          ^^J||===== \grp@wdNum=\the\grp@wdNum}%
   \setbox\GRP@wholebox\vbox{%
     \let\@elt\eqgrp@elt
     \the\GRP@queue
   }%
-    \eq@topspace{\vskip\parskip}%
-  \if\grp@hasNumber\if\grp@eqs@numbered\else
+  \global\let\eq@GRP@first@dmath\@True
+  \begingroup
+  \dmath@first@leftskip
+  \eq@topspace{\vskip\parskip}%
+  \endgroup
+  \if\@And{\grp@hasNumber}{\@Not{\grp@eqs@numbered}}%
     \if\grp@shiftnumber
       \copy\GRP@numbox \penalty\@M
       \kern\eqlineskip
@@ -1871,12 +1811,10 @@
       \setlength\skip@c{\dim@a-\ht\GRP@numbox}%
       \vglue\skip@c% NON discardable
       \copy\GRP@numbox \penalty\@M
-\debugmsg{GROUP NUMBER: preskip:\the\skip@c,  postkern:\the\dim@a, height:\the\ht\GRP@wholebox,
-         ^^J||===== box height:\the\ht\GRP@numbox, box depth:\the\dp\GRP@numbox}%
       \kern-\dim@a
       \kern-\abovedisplayskip % To cancel the topspace above the first eqn.
     \fi
-  \fi\fi
+  \fi
   \unvbox\GRP@wholebox
   \let\@elt\relax
   \eq@botspace % not needed unless bottom number?
@@ -1946,7 +1884,6 @@
 }
 \newenvironment{darray}{\@optarg\@darray{}}{}
 \def\@darray[#1]{%
-  \debugmsg{=== DARRAY ==================================================}%
   \if\eq@group\else\eq@prelim\fi
   \global\let\@preamble\@empty
   \setkeys{breqn}{#1}%
diff --git a/Master/texmf-dist/tex/latex/mh/flexisym.sty b/Master/texmf-dist/tex/latex/mh/flexisym.sty
index 6d41ac66367..2634d311bfd 100644
--- a/Master/texmf-dist/tex/latex/mh/flexisym.sty
+++ b/Master/texmf-dist/tex/latex/mh/flexisym.sty
@@ -28,7 +28,7 @@
 %%    flexisym.sty, flexisym.pdf, flexisym.ins, flexisym.drv,
 %%    cmbase.sym, mathpazo.sym, mathptmx.sym, msabm.sym.
 %% 
-\ProvidesPackage{flexisym}[2007/12/10 v0.95]
+\ProvidesPackage{flexisym}[2007/12/19 v0.96]
 \let\@xp\expandafter \let\@nx\noexpand
 \edef\do{%
   \@nx\AtEndOfPackage{%
@@ -269,11 +269,13 @@
     \fi
   \fi
   \mathcode `\-45 \mathcode `\/47\mathcode `\:"603A\relax
+}%
 }
-}
+\DeclareOption{mathstyleoff}{\PassOptionsToPackage{mathactivechars}{mathstyle}}
 \DeclareOption{cmbase}{\usesymbols{cmbase}}
 \DeclareOption{mathpazo}{\usesymbols{mathpazo}}
 \DeclareOption{mathptmx}{\usesymbols{mathptmx}}
+\ExecuteOptions{cmbase}
 \ProcessOptions\relax
 \renewcommand{\lnot}{\neg}
 \renewcommand{\land}{\wedge}
@@ -285,9 +287,7 @@
 \renewcommand{\gets}{\leftarrow}
 \renewcommand{\to}{\rightarrow}
 \renewcommand{\|}{\Vert}
-\@ifpackagewith{flexisym}{mathstyleoff}{}{%
-  \RequirePackage[activechars]{mathstyle}\relax
-}
+\RequirePackage{mathstyle}
 \endinput
 %%
 %% End of file `flexisym.sty'.
diff --git a/Master/texmf-dist/tex/latex/mh/mathstyle.sty b/Master/texmf-dist/tex/latex/mh/mathstyle.sty
index f95e9ad2a22..5dc1db7caff 100644
--- a/Master/texmf-dist/tex/latex/mh/mathstyle.sty
+++ b/Master/texmf-dist/tex/latex/mh/mathstyle.sty
@@ -27,7 +27,7 @@
 %% and the derived files
 %%    mathstyle.sty, mathstyle.pdf, mathstyle.ins, mathstyle.drv.
 %% 
-\ProvidesPackage{mathstyle}[2007/12/10 v0.83]
+\ProvidesPackage{mathstyle}[2007/12/19 v0.84]
 \providecommand\@saveprimitive[2]{%
   \begingroup
   \edef\@tempa{\string#1}\edef\@tempb{\meaning#1}%
@@ -146,6 +146,7 @@
   \or
     \@@scriptscripstyle
   \fi}
+\DeclareOption{mathactivechars}{\catcode`\^=7\relax \catcode`\_=8\relax }
 \DeclareOption{activechars}{\catcode`\^=13\relax \catcode`\_=13\relax }
 \ProcessOptions\relax
 \ifnum\catcode`\^=13\relax
diff --git a/Master/tlpkg/bin/ctan2tds b/Master/tlpkg/bin/ctan2tds
index 3bda805457a..dde403d75bb 100755
--- a/Master/tlpkg/bin/ctan2tds
+++ b/Master/tlpkg/bin/ctan2tds
@@ -1183,10 +1183,19 @@ $standardocp='\.ocp';
 );
 $standardxmt='\.xmt';
 
-# which suffixes to remove after building
-$cleanpatt='\.head|\.tmp|\.dvi|\.log|\.out|\.aux|\.toc|\.lof|\.lot|\.bbl|\.blg|\.idx|\.ind|\.ilg|\.glo|\.gls|\.loa';
+# which suffixes to remove after building.  Checked after runins and at
+# the end, in the doc directory.
+$standardclean = '\.head|\.tmp|\.dvi|\.log|\.out|\.aux|\.toc|\.lof|\.lot'
+                . '|\.bbl|\.blg|\.idx|\.ind|\.ilg|\.glo|\.gls|\.loa';
+%specialclean  = (
+ 'mathexam'	=> 'sample.tex~',
+ 'mh'		=> "$standardclean|.*\.(drv|ins)",	# derived from dtx's
+);
+
+# if this hash entry is specified, README.TEXLIVE is created mentioning
+# that the files were removed.  These are checked after runins.
 %moreclean = (
- 'AkkTeX'	=> 'still to do',
+ 'AkkTeX'	=> 'still to do, sorry',
  'bbcard'	=> 'bbcard.tpm',
  'chessboard'	=> 'chessboard.pdf',
  'chessfss'	=> 'chessfonts_gallery.pdf|chessfss.pdf',
@@ -1202,8 +1211,6 @@ $cleanpatt='\.head|\.tmp|\.dvi|\.log|\.out|\.aux|\.toc|\.lof|\.lot|\.bbl|\.blg|\
  'gfsneohellenic'=>'N*Specimen.pdf', 		# nonfree
  'guitbeamer'	=> 'guitbeamer-de.pdf',
  'jknapltx'	=> 'ubbold.fd', # clashes bbold's Ubbold.fd; sauter bbold fails
- 'mathexam'	=> 'sample.tex~',
- 'mh'		=> '*.drv *.ins',		# derived from dtx's
  'piechartmp'	=> 'piechartmp.pdf',
  'stubs'	=> 'stubs.pdf',
  'susy'		=> 'susy.pdf',			# no source
@@ -1420,14 +1427,10 @@ sub donormal {
    chdir("$DEST/doc/$whichdocformat/$package");
    &buildfilelist;
 # run the .ins files (if any) supplied
-   $inspatt = $specialins{$package };
-   if ($inspatt eq "") { 
-        $inspatt=$standardins; 
-        }
-
+   $inspatt = $specialins{$package} || $standardins;
    $Foundry = $specialfoundry{$package} || $standardfoundry;
-
    &runins($inspatt);
+
 # rebuild the list of files in the directory
    &buildfilelist;
    
@@ -1455,14 +1458,13 @@ sub donormal {
 # empty directories that we never used.
    &SYSTEM ("rmdir $DEST/*/$whichformat/$package 2>/dev/null");
 
-   killfiles ($cleanpatt);
-   killfiles ($moreclean{$package}, "more") if $moreclean{$package};
-
+   &killfiles ($specialclean{$package} || $standardclean);
    my $postaction = $specialpostaction{$package};
    eval ($postaction) if $postaction;
 }
 
-sub runins {
+sub runins
+{
   my ($thispatt) = @_;
   print "\t RUNINS $thispatt\n";
   for (grep (/$thispatt/, @filenames)) { 
@@ -1470,6 +1472,7 @@ sub runins {
     &runjob ("yes | sed 5q | $insrunner $_");
   }
 
+  &killfiles ($specialclean{$package} || $standardclean);
   &killfiles ($moreclean{$package}, "more") if $moreclean{$package};
 }
 
@@ -1661,9 +1664,11 @@ sub killfiles
 {
    my ($killpatt,$more) = @_;
 
+   local *DOT;
+   opendir (DOT, ".") || die "opendir(.) failed: $! in " . `pwd`;
    my @delfiles = ();
-   for (grep (/$killpatt/, @filenames)) { 
-     print "\t Remove $_\n";
+   for (grep (/$killpatt/, readdir (DOT))) { 
+     print "\t Removing $_\n";
      if (unlink ($_)) {
        push (@delfiles, $_);
      } else {
@@ -2412,7 +2417,7 @@ sub MAKEfeynmf {
  &dotex;
  &domakeindex;
  &dosource;
- killfiles($cleanpatt);
+ killfiles($standardclean);
 }
 
 sub MAKEchangebar {
@@ -2441,7 +2446,7 @@ sub MAKEot2cyr {
  &SYSTEM("$MV hl*.tfm ls*.tfm $DEST/fonts/tfm/bh/luccyr");
  &SYSTEM("mkdir -p $DEST/fonts/vf/bh/luccyr");
  &SYSTEM("$MV hl*.vf $DEST/fonts/vf/bh/luccyr");
- killfiles($cleanpatt);
+ killfiles($standardclean);
 }
 sub MAKEsiam {
  &setup;
@@ -2461,7 +2466,7 @@ sub MAKEsiam {
  &SYSTEM("$MV plain/* $DEST/tex/plain/siam");
  &SYSTEM("$MV amstex/*doc* $DEST/doc/amstex/siam");
  &SYSTEM("$MV amstex/* $DEST/tex/amstex/siam");
- killfiles($cleanpatt);
+ killfiles($standardclean);
 }
 
 sub MAKEmisc {
@@ -2470,7 +2475,7 @@ sub MAKEmisc {
  &buildfilelist;
  &dotex;
    &domakeindex;
- killfiles($cleanpatt);
+ killfiles($standardclean);
 }
 
 sub MAKEtamethebeast {
@@ -2487,7 +2492,7 @@ sub MAKEtexdraw {
    &domakeindex;
  &SYSTEM("mkdir -p $DEST/doc/generic/texdraw");
  &SYSTEM("$MV manual/* $DEST/doc/generic/texdraw");
- killfiles($cleanpatt);
+ killfiles($standardclean);
 }
 
 sub MAKEexpressg {
@@ -2520,7 +2525,7 @@ chdir("$DEST/doc/$whichdocformat/$package");
    &SYSTEM("rmdir $DEST/tex/$whichformat/$package 2> /dev/null");
    &SYSTEM("rmdir $DEST/doc/$whichdocformat/$package 2> /dev/null");
    &SYSTEM("rmdir $DEST/source/$whichformat/$package 2> /dev/null");
-   killfiles($cleanpatt);
+   killfiles($standardclean);
 }
 
 sub MAKEtipa {
@@ -2701,9 +2706,9 @@ sub MAKEwilson {
    &domakeindex;
    &dosource;
    &dotype1;
-   killfiles($cleanpatt);
+   killfiles($standardclean);
  }
- killfiles($cleanpatt);
+ killfiles($standardclean);
 }
 
 sub MAKEt2 {
@@ -3048,7 +3053,7 @@ sub MAKEpst {
    &dosource;
    &dotex;
    &dotype1;   
-   killfiles($cleanpatt);
+   killfiles($standardclean);
    &SYSTEM("mkdir -p $DEST/tex/latex/$package");
    &SYSTEM("mv $DEST/tex/generic/$package/*sty $DEST/tex/latex/$package");
    &SYSTEM("mv $DEST/doc/generic/$package/*sty $DEST/tex/latex/$package");
@@ -3084,7 +3089,7 @@ sub MAKEpstgeo {
    &dosource;
    &dotex;
    &dotype1;   
-   killfiles($cleanpatt);
+   killfiles($standardclean);
    &SYSTEM("mkdir -p $DEST/tex/latex/$package");
    &SYSTEM("mv $DEST/tex/generic/$package/*sty $DEST/tex/latex/$package");
    &SYSTEM("mv $DEST/doc/generic/$package/*sty $DEST/tex/latex/$package");
@@ -3162,7 +3167,7 @@ sub MAKEpict2e {
    &SYSTEM("rmdir $DEST/tex/$whichformat/$package 2> /dev/null");
    &SYSTEM("rmdir $DEST/source/$whichformat/$package 2> /dev/null");
    &SYSTEM("rmdir $DEST/doc/$whichdocformat/$package 2> /dev/null");
-   killfiles($cleanpatt);
+   killfiles($standardclean);
 }