Am I the only one who seems to have this problem: After reading every given topic in a forum (not using the Mark Topics as Read button), the indicator still reads as unread. Checking against last post times shows there are no changes, but still the topic still reads as unread. This is true for the forum indicators as well.
Mind you, this does not happen all of the time, but often enough to get under one's skin (alright, I admit it, under my skin).