Works with Chrome, Firefox, Safari but not IE

I'm using WP 3.1 and Atahualpa 3.6.1. I'm trying to get my first site up and running : www.chowstalker.com.

But there's one problem when viewing with IE. Some of the content is shifting down out of the frame. I'm very green with all of this and paid someone to get the gallery set up. They were the ones that recommended using this theme. I'm trying to dig in, and learn but if someone could point me in the general direction of where the problem might be, it would be much appreciated! TIA.