Broken hyperlinks in header
Ported bug #1886187 from sourceforge http://sourceforge.net/tracker/?func=detail&atid=600660&aid=1886187&group_id=92412:
In Beamer-3.07 for the theme JuanLesPins, the section/subsection entries in the slide's header are NOT hyperlinked. The only clickable entity in the header is the short paper title. I've t yet tested all other themes, but most seem to work.