Mail headers & attachments sometimes corrupt after moving requiring rebuild
After moving the mail, occasionally I find that the mail headers (From, Subject, Date, To, etc) are missing from the top of the message display window, and any attachments are just showing as garbled text underneath the body of the email (the same as they normally appear when you go to +View > Message > Raw Source+ )
When I log into Gmail and view the same message, everything appears normally. It's not until I go to +Mailbox > Rebuild+ in Apple Mail that the problem is fixed. It becomes very frustrating having to rebuild the mailbox every time this happens, especially on my Archive folder or when there is a large attachment.
MacBook, Mac OS X (10.6.5), Intel Core 2 Duo 2.4 GHz, 3GB RAM