Re: ion artifacts for vdpau?
This artefact may simply be tearing due to lack of sync-to-VBLANK in the blit-based presentation queue in that driver release. Please try out the latest 185.18.* beta release and see if that fixes it for you.
If not, can you please see the sticky "How to report problems with VDPAU and/or MPlayer/VDPAU", and provide the bug report information mentioned there.
Does this happen on all streams, or just 1 specific stream? If just specific streams, can you please upload a sample to the file-drop mentioned in that sticky.