Running Windows 7 Home Premium 32-bit...
Just installed an ATI TV Wonder HD 600 Hybrid Tuner (TVW600PCIEV). In the ATI Catalyst Media Center... the TV shows up fine. But, in Windows Media Center (which is imo a much better program), I get only audio and a black screen. When I attempt to rewind/fast-forward with the timeline... it shows the video. But on the main screen, just black.
I've tried installing/uninstalling drivers for the card from the CD and online. I also uninstalled the Shark007 Codec pack I had installed (fearing it might be interfering with the video playback on WMC).