I did a quick search through this forum to make sure this hasn't already been reported, but I didn't see anything similar . . . .

When you are viewing a thread, there are links for "Last Thread" and "Next Thread" at the top and bottom of the thread. The links at the bottom work fine, but the ones at the top don't appear to do anything other than reload the current thread you're viewing.

I can recreate this behavior with IE and Opera, so I'm pretty sure it's not configuration related.