I recently have had problems where Safari and Mail would not remember passwords (basic HTTP authentication, POP, IMAP) even though I would check the 'keep on Keychain' box when re-entering them. I was always prompted over and over again. Numerous searches yeilded various fixes, none of which worked. I was about to give up when I stumbled upon this discussion from the MacOSXHints forum, which led to this thread on the Apple Discussions site. (Oddly, that thread never showed up in my Apple Discussion searches.)The fix for my particular problem was to reinstall Safari and Mail because I had used Service Scrubber on them. Other people appear to have fixed the problem by restoring from Time Machi...