I doubt that video drivers from ATI or Nvidia are related, as even the generic drivers (non accelerated) are capable of delivering video overlay.
BTW: Why struggle with ATI in linux, linux drivers are fully supported by Nvidia, with regular updates. Even if you don`t play games, it really speeds up web browsing, scrolling and things such as flash. I know you love your ATI card, but it sure makes things easier when you have an Nvidia card. Just completed Max Payne 2 & Half Life 2
Single unified driver for all nvidia cards, just like in Windows.
Yep, I`m aware of the advanced background feature, and have seen the globe, it`s in configuredesktop/advanced options, really neat feature! you can change the frequency it updates (default is 10 minutes).
Could be possible to use this to display TV!
thanks for the suuggestion.