Intresting...in firefox 22.214.171.124 on Mac you store is a little bt sloppy... I took a VERY quick peek under the hood on it and you're probably dealing with a browser compatibility issue. I would say it's a padding or margin issue with one of your divs or elements inside of a div. Basically what happens is inside of your center section, the left hand navigation is fine. the rest of the body info, however, is pushed down below the left hand navigation. Which is what makes me believe it's a margin/padding issue. This makes me scroll down a page length to see any of your products or content. Hope you can get it worked out! otherwise, the site looks great.