FireFox compatible issues

[TheIrishThug]

www.VisitTheSaint.com
works fine in IE. in firefox, some of the backgrounds don't load and most of the formating of the text is wrong as well. some of the problems r much more noticable on some of the other pages and not just the homepage.

can anyone point me to what is causing these problems and how i can solve them?

thanks

[Fang]

Firstly the CSS is full of errors, validate and the HTML also requires validating