When I switched on my Mail yesterday I was shocked to find that ALL my email messages and email account information had disappeared. Mail showed me the regular "start up" screen that asks you to enter a new account. It had been working fine for the last two weeks since I'd installed Leopard. When I'd first installed Leopard I had simply moved my original "Mail" folder and com.apple.mail.plist from Tiger over. It had been working flawlessly until now. I went into my Mail folder and all my old email accounts and messages are still there, yet I can't see them in Mail anymore! It's just bizarre. Has anyone else experienced this or know what I can do to get my old messages back? So far I've set up all my email accounts again and it's working for new emails, though I still can't access my old emails. Any thoughts/suggestions on this this would be much appreciated. Thanks all.