I already test it:
Sapphire X1650 pro AGP 512MB
openSUSE 10.2 x86-64
Switch to text mode and back to X is working now!
I noticed better performance moving and resizing windows.
I use openGL to playback videos on mplayer and xine and so far i have not noticed any problems, working as 8.35.5 did.
PS: When switching to text mode sound playback stops while been there and back to work when return to X.