and read the AcrobatReader 5.0.crash.log (if you double-click on the file, it should just open up in the Console utility). Two lines caught my eye:
#1 0x001e4640 in LanguageSelector::ChooseSystemLanguage(void)And that seemed pretty strange to me (!): Acrobat was trying to check my language setting(s) and found nothing ? Hmm...
#2 0x001e3d5c in LanguageSelector::OpenDefaultLanguageResFile(void)
So, I opened my System Preferences -> International Prefs, and clicked on the Language tab. In order to force a value to be written (not sure where that pref lives...), I dragged French to the top of the list and closed the Pref panel (Show All). I opened it again and moved English back to the top of the list and quit out of System Preferences (be sure not to skip this step!) ... and voila - the problem was fixed, Acrobat Reader launched fine.

