Thanx to Roseman for bringing this one to our attention.  There will be another Firefox release possibly as early as tomorrow to fix an issue with saved passwords where the website, username, or password has international characters in it.  If you haven't updated yet and use this feature, you might want to hold off another day or two.

References: http://mozillalinks.org/wp/2008/09/quick-firefox-update-on-its-way-to-fix-saved-credentials-access-issues/