Re: VDPAU troubles on a GT 430
Hmm symlinks seems to be fine(not sure are they really, ubuntu mess them very often). It looks like you have installed drivers directly from nvidia.com, not from x-swat ppa.
You could try install packages libvdpau1(probably this), vainfo and vdpau-va-driver(vdpau to va-api wrapper). And see if that help(check what vainfo says and if it gives you VAprofiles for different fileformats you can use vlc with hw acceleration).