Comment 2 for bug 20461

Video Output: X11/XShm/Xv
Video Card: 0000:00:10.0 VGA compatible controller: ATI Technologies Inc RV350
[Mobility Radeon 9600 M10]
Xorg Driver: ati
Xorg version: 6.8.2-53

it happens with at least the following file formats:
RIFF (little-endian) data, AVI, 688 x 288, 25.00 fps, video: DivX 5, audio:
Dolby AC3 (6 channels, 48000 Hz)

(and atm totem refused to play any other file, but I've seen it more than once)