Massive improvements here for me. Firefox 3 had appalling scrolling under FreeBSD on <div> heavy websites or websites with floating relational <div>'s such as http://www.freebsdnews.net/
when you scroll down past the title. Or Slashdot's new comment system that caused the whole desktop to judder to a halt until the page finished scrolling.
On these drivers it scrolls as smooth as Firefox 2, very happy about this as I am currently spending all day working on our companies new website which suffered the same scrolling problems
Thanks very much!
Looking forward to see what happens with VDPAU.