Okay, I think the problem is the combination of the separator and the advertisements, for some reason they're causing a problem in IE.

I've shortened the separator image to 580px, so change it out for this one:

Then in the CSS, change the separator width to 580px.

The code should look like this:

 .separator{
		
		height: 35px;
		width: 580px;

Let me know if you run into any problems.