ok so nearly a year later and I thought I would revive this thread.
I am now on Ubuntu 10.10 64 bits with the same card (Nvideo GeForce 8200) and I use the nvidia driver 260.19.06.
I also use Compiz
Have a look at this video capture from my screen : Icon rendering issue
The first part is when CD is loaded (using OpenGL) for some time and user on the computer have switched session. Then you return on the session with CD and you see that type of corruption.
At second 28 I quit CD and relaunch it. You can then see that the icons are now correct.
I can give more info if needed. Just ask