I’ve only had a look with IENetRenderer (I’m on a mac) and been through it quickly with firebug. The only problems I am seeing are in the sidebar.
Couple of things I did notice are:
This isn’t doing you any favours, and probably confusing the hell out of ie
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Lose the first <html>
You have used img id="icon" 4 times and consequently none of your items are getting their padding in ie. Try changing it to a class instead.