GDI+ & GeForce 6800 Ultra & Latest Nvidia = trouble?

I was experimenting with some GDI+ on my new system that has a GeForce 6800 Ultra card on it (Prolink is the board manufacturer). Talking with Prolink was pretty much useless (ie download the latest drivers). I actually used the latest drivers to test my code. Removing the drivers from the system allows my code to work just fine. On my other graphics cards, on others systems, the code draws correctly.

So my questions:
(1) Has anyone else encountered GDI+ problems on the GeForce 6800 Ultra? Specifically graphics sporadically fail to update and always fail when the window is maximized. Return codes on all calls indicate no problem either. The exact same executable works just fine on other systems. If I obstruct the view of the maximized view with a menu the portion of the obstructed view refreshes correctly, but not the whole scene. Also I am coding outside .NET, directly onto the Windows API.

(2) I'm guessing since the 6800 Ultra is new and rare the drivers have some catching up. Anyone know how long drivers take to mature? (You'd think on their flagship gamer card problems like this would not occur).

Thank you,
Tim