This may not be your problem, but it sure has cured a bunch of weird things going on on my computer on this site. Clear out all your temporary cache files, and reboot your browser and see if the problem goes away.
Restarting the computer also helps sometimes if you leave it on for days at a time.
Not sure what happened there, but glad to hear it has cleared up. Since this is resolved, I will be closing the thread. If you continue to experience an issue, start a new thread or send me a PM.