Categories not loading in IE 7 or 8, ok in Firefox

Hi, when I click a category link the correct url shows temporarily in the status bar, but then the homepage shows up. This is happening on two PC’s, one with IE8 and one with IE7. I am running FF on the same PC as IE8 and it loads fine in FF. Here is the site: https://www.MoneyLinksOnline.com

Thanks!