Whenever I run a game, a new screen pops up and the video kinda like flashes continually. It does not happen with all games but most. The games I know I have been having problems with has been games like Billard-GL, Vega Strike, Flight Gear, Space-Orbit. Freeciv works great as well as other games like Chess. This just seems to happen with games. The office suites, Scribus, Celestia and Stellarium work great too..... I have an ATI Accelerated graphics card and know the drivers are working (or at least the operating system is telling me that they are).
Any suggestions on what I can try?