Sorry for the necro, but I'm pretty sure I've found a new bug. Or maybe it's a feature, I'm not sure.
I view the forum through "Show unread posts..." and do a quick refresh after I've read the new stuff to catch new posts mid-session. If a new Talkback is opened while I'm browsing, and I view it from Unread Posts and refresh again, it doesn't go off the unread list and the view count doesn't increase.
However, if I leave the site and return, it'll be off the list. Next time it comes up, I'll take a screenshot.