I'm having a problem when viewing my store in Firefox 3.6.3 using Mac OS 10.6.3. It looks like the CSS is the problem, but I don't have a clear idea on how to fix it. I'm proficient at editing CSS to modify themes, but I was never good at cross-browser compatibility.

It looks just fine in Firefox using Windows XP, as well as in Safari on my friend's Mac. I was alerted to this problem by a customer this morning.

I'm using ZenCart 1.3.9b.

http://store.alexheberling.com

Here is a screencap, as well: http://alexheberling.com/media/ff_store.png