Uh-oh, I have the exact issue mentioned in the original post: no count of new messages since a few days after I updated to PR 1.3. I have one Gmail account, one Yahoo account, and no MfE accounts. Additionally, I have to click on the 'All Messages' button to see the newly-arrived mail, otherwise it stays hidden. Not a huge problem since the notification system still works, but still something I'd like to see fixed.

And yes, as a former n900 owner, these mail problems seem all too familiar. Why is this such an issue with Nokia?