With VDPAU -benchmark numbers are rather misleading.
Try normal playback and give these numbers from the status line:
On Mon, Dec 21, 2009 at 10:52:44PM +0100, Richard Hartmann wrote:
> V: 208.5 0/ 0 14% 33% 0.0% 0 0
^^^^^^^
(the first two % numbers).
You could also try to compare against the version from SVN.