I'm experiencing this problem, and I'm not quite sure how to resolve it.
I have the following code for the scrolled div:
<div style="overflow-x: hidden; overflow-y: auto; width: 942px; height: 300px;">
And for a horizontally-scrolling page, I have:
<div style="overflow-x: auto; overflow-y: hidden; width: 942px; height: 280px;">
It works fine in FireFox, but in IE, the overflow stretches the page. Many times, when you pull up the page, it looks fine, but if you click on another open window of yours, then click back, it messes up.