Comment # 7 on bug 73191 from Rachel Greenham

requested by fritsch to try with vdpau enabled but vdpau *mixer* disabled. I
find with vdpau mixer disabled, playback looks fine, the problem disappears. So
the problem would appear to be in the mixer part. :-)

This matches that portion of vladi's findings, though to reiterate 10.0 and
10.0.1 worked fine for me with vdpau mixer enabled.