HTML/CSS: Menu from bizarro land works in IE7, nothing else

1

Hi all. I’ve got an issue with a menu I’m developing for a website. The CSS/HTML rollovers for the buttons on my menu are working in IE7, but will not “image-swap” in IE8, Firefox, or any of the others (weird right?).

Here’s a link if you want to help:

Site

CSS

Thanks in advance, I need all the help I can get - I haven’t slept in 18 hours!