Panther – Mail.app Synchronize Problems

I narrowed down the problem where Mail.app kept freezing while checking all of my IMAP folders. If “Automatically synchronize changed mailboxes” is checked and multiple IMAP folders are being synchronized at the same time, Mail.app seems to freeze for an extended period of time. The only way to recover seems to be to force quit Mail.app, delete cached mailboxes, restart Mail.app and hope for the best. Since unchecking the synchronize box I haven’t had a problem on either my Powerbook G4 or or MDD G4.