Haha well in my (and almost everyone else's) opinion here IE sucks. Anyway, try downloading another browser (I recommend Firefox, plus it's working on my Firefox) and see if the problem continues. I'd guess there's about a 50% chance it's just a bug in IE.
EDIT: I just tried to access that site using my IE and got the same problem. Try another browser, my friend that's your problem. Something's wrong with IE. really nothing you can do about to fix it.
Again, I highly recommend you simply switch Firefox. After about a week (getting used to some of the differences) you'll wonder why you didn't sooner.