[Problem][iDeneb] Screen Glitch?

[Lunfai]

I've finally installed iDeneb and it's beautiful, althought I'm suffering from screen glitching which is really strange. Basically what happens is; whenever I move the window or scroll down it will basically just flip the content of the window upside down until I minimize and return or click desktop and click the window again. It's really strange.

 

My Graphics crd [8600 GT 256mb] is installed correctly and core: graphic accelration. I've tried to disable Quartz and see what happened but the problem still exists. Is there a way to turn graphic acceleration off? or does anyone know any fixes/cures?

 

Thanks