Re: VDPAU 9400GT MPEG2 artifacts
> VDPAU nvidia: Error detected 2 195
That simply indicates that the overlay-based presentation queue could not be used for some reason (the blit-base PQ is used instead). This is probably completely benign, and even if not, certainly not something I'd imagine could possibly cause your issue.
One thing I have just noticed: You're running a 64-bit OS, whereas I tested on 32-bit. This might possibly make a difference; I'll see if it does...