I'm using Leopard's Mail on my iMac at home to access three GMail accounts via IMAP (one GMail, two Google Apps). It was working perfectly for awhile (after following the folder setup instructions found at http://5thirtyone.com/archives/862), but now it no longer syncs read/not read status. It gets all my mail, but it no longer marks things as read even when they have been. For example, I got about 30 emails during the day today across those various accounts. I'm using Tiger's Mail at work to check those same accounts, and as I read them they are appropriately marked as read up on the GMail server, verified by logging in via the web interface. When I get home, however, all those emails are still marked as unread in Mail 3.0. I've double checked all my IMAP account settings and they're all correct. It simultaneously stopped working on all three of those accounts. Any ideas?