I havent looked through your css fully, and honestly Im not really sure whats wrong with the page since I neither know your design intent (you havent really mentioned it), nor have i looked at the page through Moz/Opera, but if I may offer a small piece of advice:
If you plan on not using any tables anymore, which your site implies, then while you're redesigning you should throw out every table you have completely and start from scratch. That way youre not building your css around any leftover tables, just so you throw out the tables later and have to retweak your css. the content items on your page can easily be styled with <h1> and <p> tags, and theyre MUCH easier to manipulate than the tables you have there already.
Just my spare change.