Unread posts bug

[Silverthorn]

According to my understanding of the code, it'll sum up all posts of threads you haven't read. For example, if you were to skip a certain thread and people posted 10 new posts in there, the counter would increase by 10. If you clicked on that thread, all new posts would be deducted from that counter again. If you have a specific set of threads you don't care about at all, you can simply hit "mark all threads as read" as @Simoneon described. Alternatively, on the index-page, at the bottom, there is a "mark all forums as read"-link which essentially does the same.

tl;dr: either manually click yourself through all unwanted threads or hit "mark all X as read" to bring the counter down to 0 and see if the problem still persists.