I'm not sure whether this is a problem my end (using FF 3.5.11) or not. Sometimes the topics are misaligned in the topic list, it tends to be the first topic and then another topic further down the list, but occasionally it will be just one topic or more than two topics. If I refresh the browser then it is displayed correctly, but when navigating to a screen I would say this is happening around half the time. I have included a screenshot:
Just updated FF to 3.6.8 (I haven't used this laptop much in the last 6 months hence why FF was an old version) and it seems to be working fine now. While using 3.5.11 I also noticed that the click to show full size image feature wasn't working, again it is fine in 3.6.8.