they should ... which os/browser? and can you duplicate it with only one tab open, i.e. make a new post and then edit it and see if your edit appears within a few seconds?
Win XP with SP 3. Firefox v4.0. My editing of posts is fine, and appear as quickly as new posts do. It was another user's post that flagged the unreads as 1, but I was still viewing the same topic. I clicked on the unread, for it to display the same topic, to click back in and find the last post edited.
Edit: testy test. Yes, mine are fine.
Edit: testy test. Yes, mine are fine.