I'm having the same issues in IE7, not on every page, but most of them. (
this for example - loads the whole page, then reloads itself).
This was with stock templates too.
Although I can't see it on yours anymore, did you fix it.
Also in the cart. Add an invalid coupon, then submit. The page will load (as it shuold) and tell you the number is invalid, then it will refresh itself but this time the message will be gone (as it didn't submit anything)... very frustrating.