About a week ago the "Show unread posts..." link stopped working for me. I’m always logged in to the forum and usually klicks this link every time I enter the forum. Now when I do it the page is empty. If I click "All unread topics" the result is the same. This has worked perfectly for the entire time I’ve been coming here som I’m a little surprised. Has something changed in the last few weeks or is the problem on my end? The function works for the time I’m at the forum, ie new unread posts since I entered the forum shows up, but when a day or two has passed the list is empty.
Have you tried manually logging out when you leave?