10.4.9...Ever since my mother sent a 25 mb file in her email, Apple mail has not been right since. We've seen it launch itself after a restart, as well as crashing all the time. So, I was going to delete the .plist... but I wondered what happens to the mailboxes when you do this. In mail when you delete the plist, you've got to set up your account from scratch. Should I back up the mailboxes to another spot and then import them, or leave them where they are and hope mail figures out they belong to the new account? Alternately, if anybody has a better idea how to resolve this problem, I'm all ears. Thanks.