Comment # 9 on bug 66452 from Christian König

Well that's actually not really a bug. The hardware just doesn't support WMV3,
it only support VC-1 in the advanced profile. So depending on what stream you
got it might work or not.

Anyway I've just pushed a patch stopping advertising VC-1 simple and main
profile (which are essentially WMV3) support on JUNIPER as well.