Use Mozilla firefox. You'll notice that the right content gets thrown all the way to the bottom of the page but when you refresh the browser then everything loads up ok. Why does this happen? Opera and Safari is fine. Could it be the browser doesnt load the CSS correctly?
Could you try fixing/validating the code (see the link in my previous post) and then take a snapshot of what is going wrong in firefox? I'm seeing a few different things in a few different browsers and am not sure exactly how you want the layout to look.