It's my understanding with IE that sometimes a browser restart will reset it, and sometimes a full restart of the computer will do the trick. There's absolutely no tech reason for that, just an observation on the lines of what my physics professor told me eons ago: If something isn't working, hit it. Roughly fifty percent of the time, you will fix the problem. The other fifty percent of the time? Well, it was already not working, so what did you lose?