Hi aneuryzma,
from the screens you uploaded your site is very creative!
I noticed this in the javascript thread....is your problem actually a Java issue or css/html issue?
First you need to fix the link or your server, I get a forbiden error on IE and firefox. I'll give you my opinion why you are having troubles but without seeing the issue live just take it with a grain of salt.

How did you dev the site? Can you give more info? What version of firefox are you using? Have you tried any of the dev tools in firefox? I've never used safari (i'm 32 years old and I'm a PC)
The problem is likely with standards, a new version of firefox will probably fix the problem. If not, you've probably got some iffy code, did you write the java from scratch?
Oyvay...so many qustions!
Tim.