Don't know if this is really a bug or a feature, but if I'm in a forum with sub forums, and I mark the parent forum as "read" (using the "mark this forum read" link above and to the right of the list of threads) the sub-forum isn't marked as read. At least that what I assume is happening, when I visit the forum home again, I still see that the parent forum link is bold (unread), until I go into the sub forum, and mark that as "read". Maybe its a feature? If it is, do you have to visit each sub forum and mark it read if you're not interested in it? I tried a search, but couldn't find anything related to "mark forum read" and "sub forums".