Weird problem

My website was first built in tables.
But since the search engines doesnt like this i changed the structure to div’s only.

The website looks good in Firefox but not in IE.
http://funkyjones.se/h1/om_oss.html
Why?!

CSS file here:
http://funkyjones.se/h1/style.css

It’s nice and centered in Firefox, its not centered in IE
Text is overlapping in IE.

Why this? My css file isnt using any weird positioning options.