I don't have this problem.
I did notice another thing though...
When I expand my browserwindow to full screen the 'page' doesn't fill up the width (though sometimes it does).
Even though I mostly have it at about 1/2 to 2/3 of the screen it's a bit of a shame, especially when there are large pictures on a page (which would suddenly get their own scrollbars).
I'm running a resolution of 1920 * 1200 by the way.
Could you be a little more specific as to what is happening?
You're on page 2 of a thread for instance...
And then your mouse scrollwheel doesn't work?
Can you still scroll by clicking on the scrollbar and dragging?
Is there even a scrollbar present?
Are we talking vertical scrolling or horizontal scrolling?
Have you tried clicking somewhere on the page (that isn't a link) and then scrolling?