This sees to happen to me sporadically here on Xenforo and on my own forums. It happens when I search for new threads. A "refresh" always corrects it. It only happens maybe 1 out of 35 or so times. I am just wondering if it is happening to others as well. I have been able to duplicate this on both Firefox 3.5 and 3.6. RC3. This screen shot was taken just a moment ago on these forums.