Attached is a zip file with a *tiny* DX8 program (NVBlinky.exe) that shows
the flickering problem (at least on my setup and one other persons setup).
It should be useful for quickly verifying if you have the problem or if anything that you do fixes the problem.
It is most effective when run on an analog monitor.
A VC++ 6 project with the source is included for the curious and the suspicious among you. Compilation requires the DX8 SDK. All the program
does is draw a set of points whose geometry is updated 10 times a second.
let me know how it works for you.