Hey guys, I just turned on an option to use the database as something to mark your threads as read, instead of the old "inactivity" cookie-based system used since the first vB. If you notice any problems, please tell us in this thread.
I think you might have noticed that any thread ever has turned unread - if you could simply go to the top right of the forum display page and click quick links -> and "Mark All Forums as Read", that should solve the problem.
However, please only do this after you've read today's posts, or else you'll lose their unread markings.