There is a developing thread in this forum, here, that discusses a failure of push email to work correctly with version 2.0 of the firmware. The symptoms described are the same ones I have with two IMAP accounts and two POP accounts. I post this thread so that people won't think this is just a push mail problem. It would be wonderful to know what a permanent solution is to this trouble. For now, turning the phone off and back on, then manually refreshing mail is the only completely reliable method I know, but it is only temporary. Restoring as a new phone and starting fresh has been reported to work, but seems unnecessarily unpleasant. Edit: I filed a report of this at Apple's feedback site (www.apple.com/feedback). If you are one of the users with the problem, please do the same. I amnot convinced that complaining in a forum like this helps. At least the feedback page gives you an official way to register the trouble.