First I need to say that I didn't installed the AverMedia AverTV software in Vista. It was already intalled in Windows XP when I upgraded to Vista but nonetheless for me the TV Tuner is working perfectly in Vista and this is what I have installed.
AverMedia AverTV 5.2 + AcerMedia AverTV WDM Audio/Video Capter (878) drivers version 7.0.2.9
I downloaded them a long time ago from the AverMedia.com site. So I'm guessing the new software + drivers for the
AVerTV Studio 203 (M16A) which are versions 5.3.0.22 and 7.0.3.3 will work with Vista. Check them out and tell me if they work.