Yeah "Similar Threads looks like it's showing up on all pages and as it stands there doesn't appear to be a way to disable it from the user side preferences. There's a backend update ongoing so we'll probably have to wait until the dust settles and then see if there's something Gav can do about it. I'll point him to this thread if he doesn't see it on his own.
Edit: Based on the "Similar threads" that are showing up at the bottom of this particular thread, the suggestions don't look to be particularly useful or germane to the topic at hand.