specialcommands 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 problem may occur in a number of different circumstances. For a couple of them, there are work-arounds: First, if you have an URL which is active (so that clicking on it will activate your web browser to “go to” the URL). In this case hyperref employs the url package to split up the URL (as described in typesetting URLs), but the dvips driver then suppresses the breaks. The way out is the breakurl package, which modifies the
urlcommand to produce several smaller pieces, between each of which a line break is permitted. Each group of pieces, that ends up together in one line, is converted to a single clickable link. Second, if you have a table of contents, list of figure or tables, or the like, hyperref will ordinarily make the titles in the table of contents, or captions in the lists, active. If the title or caption is long, it will need to break within the table, but the dvips driver will prevent that. In this case, load hyperref with the option
linktocpage, and only the page number will be made active. Otherwise, if you have a lengthy piece of text that you want active, you have at present no simple solution: you have to rewrite your text, or to use a different PDF generation mechanism.
This question on the Web: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=breaklinks