Oliver, I'm not sure it's that bad -- "Un-direct fullscreen windows" should be enabled by default. i.e. full screen windows should draw directly to the framebuffer. Check your Compiz configuration if you've messed with it.
My advice, however, is if your driver doesn't support indirect 3D (that is, any driver other than proprietary nvidia), disable Compiz. It's really not worth the grief.
Oliver, I'm not sure it's that bad -- "Un-direct fullscreen windows" should be enabled by default. i.e. full screen windows should draw directly to the framebuffer. Check your Compiz configuration if you've messed with it.
My advice, however, is if your driver doesn't support indirect 3D (that is, any driver other than proprietary nvidia), disable Compiz. It's really not worth the grief.