Comment 311 for bug 125970

(In reply to comment #160)
> I think this might have something to do with the nvida video card. On my
> laptop things scroll fine, and on my desktop it's VERY slow.

Maybe you laptop with Vista OS
and desktop with XP.

I have information that same browsers renders pages with fixed elements on Vista much faster that on XP.
Maybe it is because new 2D infrastructure in vista.