I've noticed this going on for a while now. Sometimes the forum won't state that there's new posts in a thread, or it won't make the title bold indicating that it has new posts, when it indeed has new posts.
This has made me miss a lot of new posts on threads that I try to follow. Just looks as if no one's posted anything new in some of the forums, but they have. They have the icon that shows there's no new posts, there's no bold title, yet there's posts in them that have been posted since I've checked.
I'm not on about 'subscribing' a thread with email notifications - that works fine.
It's been happening for a few weeks now. Any ideas guys?