Someone from NVIDIA has made a post in the forum of NV News to ask for help about recently discovered flickering display issues with some NVIDIA and ATI cards :
We have become aware that both NVIDIA and competitor’s cards are experiencing similar problems that are described as “flickering”, “rolling lines” or “quivering” in different forum posts. Here are a couple of examples:
NVIDIA has been investigating these problems; we are having a difficult time reproducing the issue. We are under the impression it is a noise issue, not a graphics card issue and is system specific.
In an effort to find a solution, we ask that anyone in the Bay area who is experiencing this issue on an NVIDIA GPU and would like to visit NVIDIA with the system in tow contact us. We can use the system to identify the problem and see if we can resolve the issue. You will be doing a favor to NVIDIA and a service to the community. We will also make sure you leave with an arm full of NVIDIA swag!
First come first served! We can not look at every system in the Bay area, sorry.