Unread or not?

Last couple of days I see a notice I have unread topics. But when I click on the Unread-button it shows no unread topics and the notification dissapeares after that as well. I’ve seen this about 15 times now since, I think, tuesday. Any idea what this forum makes thinking I have unread topics, while not showing any?

This is a bug, I think, since the beginning of the forum.
The counter of unread topics don’t jump from 1 to 0 (not allways, but a lot of times).


Oh yeah i have that almost everyday. If theres actually nothing unread, it just adds a 1 for some reason.