When using the hyperref package, you make a block of text "active" when you define a hyper-link (when the user clicks on that text, the reader program will divert to the target of the link).
The hyperref package uses a driver (in the same way as the graphics package does), to determine how to implement all that hyper-stuff.
If you use the driver for dvips output (presumably you want
to distill the resulting PostScript), limitations in the way dvips
deals with the \
special
commands mean that hyperref
must prevent link anchors from breaking at the end of lines. Other
drivers (notably those for PDFTeX and for dvipdfm) don't
suffer from this problem.
The only known solution to this problem is to use the
breakurl package. This package provides a very simple
solution: in place of the single link, the \
burl
command produces
a sequences of small pieces, between each of which a line break is
permitted. Each sequence of pieces, that ends up together in one
line, is converted to a single clickable link.
This question on the Web: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=breaklinks