Website messed up on IE 8 and 7

[on3]

I've created a website with Wordpress as the backend and all of the positioning of the divs are messed up on IE8 and 7. For example, there is a bottom facebook-like, black toolbar with tooltips that I created using "bottom: 0" as the position property and it is totally effed in IE. On every other browser (Chrome for example), the black toolbar just stays at the bottom of the browser no matter where I scroll -- as it should. I'm obviously missing something.

Pleeeease any help is appreciated. Here is the site:

http://www.compusoftdevelopment.com