Whenever I fire up the TV app with my ATI 9600 I get a black screen. I'm running the latest WB 5 beta (from Nov 18th) and V9.08 of the ATI application. I'm pretty sure the TV app worked with the first beta of WB5, but I can't remember if I tried it or not. I know it works with the older WB4 stable version.
More info....looks like it's only a problem with transparent or per pixel apha blended skins...older skins don't cause the problem.