Since updating to Snow Leopard 10.6.1 Mail.app has been unable to retieve IMAP mail from my OS X Leopard 10.5.x server running the standard cyrusd. Does anybody have any clues? Mail just sits there syncing the mailbox forever, it never stops. If I turn on logging to file, it just continuously FETCHes from IMAP and never ends. It's driving me mad. My iphone can get the IMAP mail from the same server absolutely fine. I added the mail account to a new OS X Snow Leopard user account, and that also failed to get anywhere. So its not corrupted data on my MBP. It doesn't appear to be corrupted data on the OS X server either, as the iPhone works.