If you use GMail IMAP with Apple Mail, you might have experienced the dreaded garbled emails. This problem occurs when you move email messages to different folders. How do you know you have this problem? When you click on an email to view it, attached images and the mail headers are garbled; eg, you see all kinds of strange characters and the attached images are not viewable. This is a bug; not sure if it’s Apple Mail or Gmail, or both. You can read more the Gmail / Apple Mail garbled message issues here. The fix is simple: restart Apple Mail. But that is pretty clumsy. A better workaround is this: In Apple Mail, go to Mailbox > Rebuild. This is a workaround, not a fix. Let’s hope Apple and Google  can put aside their feud in order to help their users :)