Page is loading well in IE, Chrome, Safari ... not Firefox- Please Help!

I am working on a website and so far it is coming together the way I intended. Looks good on Chrome, and Safari. IE is not right yet but it looks as expected since I haven't done the IE style sheet yet. However, Firefox is producing a completely unexpected problem.

http://nickbogatin.com

I will post code but I don't even have an idea as to where the error is yet.

Help would be appreciated.

Nick

Looks good on Chrome, and Safari. IE is not right yet but it looks as expected since I haven't done the IE style sheet yet. However, Firefox is producing a completely unexpected problem.
It'd be easy for us, if you give some hints about the issues.