Apple KB Article: Where the heck did all my email go?

If you're anything like me you enjoy spending your Saturday nights sipping a glass of cognac and reading Apple's Knowledgebase articles. Believe you me, it is a good time.

Whist pursuing the knowledge base I sometimes stumble upon an article that is both entertaining and informative (infortaiment at its best), and 'Mac OS X 10.3, 10.4 Mail: Overstuffed mailbox is unexpectedly empty' is exactly that. Apparently Mail will freak out if you have more than a certain amount of mail in your various accounts, and it will appear as though all your email is gone. It isn't gone, and you can read the article to find out how to fix it.