I have been using Leopard (Mac OS X 10.5) for multiple weeks now, and I am absolutely fed up with Mail.app (others are as well). I rely heavily on email for all aspects of my business, and I finally had to resort to using webmail today so I would not waste any more time troubleshooting and manually clicking on all my IMAP folders to see if I had new messages in them (something is broken with showing the “Unread” status. On top of that fun, Mail.app hangs multiple times a day, and I noticed today, the mail activity monitor (within the left column of mail) does not match the separate mail activity window if you have both open at the same time. I was hoping Mac OS X 10.5.1 would resolve some issues, but frankly I have been having more issues! Serenity now!