I have a Mail.app rule that copies certain incoming messages into an archive mailbox. I'd like those messages to be marked as read in the archive mailbox but remain unread in my in-box until I actually read them. I tried adding "Mark as Read" to the copy rule but that marks the message as read in both the archive mailbox and my in-box, so I never have any unread messages in my in-box. Any ideas?
It seems Mail 6.0 in Mountain Lion has fixed this for me. When I have new mail it shows as unread in both my in-box and my archive mailbox. And now, when I read it in my in-box it gets marked as read in both my in-box and my archive mailbox. Chalk one up for Mountain Lion.