I can confirm this problem with the latest nvidia-glx-new and nVidia 6200 TurboCache.
Why is this considered a small bug? It's critical in my opinion because it effectively cripples a new Ubuntu installation once the user enables the restricted nVidia drivers, which is recommended. Once restricted drivers are installed, 3D desktop effects are immediately enabled by default. This slows the system to a crawl, and seems to make many windows appear blank, like the Preferences/Appearance window, so one cannot disable 3D desktop effects. The only way is to disable the restricted nVidia drivers. Non-savvy users would not know what to do most probably.
I can confirm this problem with the latest nvidia-glx-new and nVidia 6200 TurboCache.
Why is this considered a small bug? It's critical in my opinion because it effectively cripples a new Ubuntu installation once the user enables the restricted nVidia drivers, which is recommended. Once restricted drivers are installed, 3D desktop effects are immediately enabled by default. This slows the system to a crawl, and seems to make many windows appear blank, like the Preferences/ Appearance window, so one cannot disable 3D desktop effects. The only way is to disable the restricted nVidia drivers. Non-savvy users would not know what to do most probably.