I am running Windows 7 Pro, 64-bit. I have the trial version of TCMD 12 installed (build 32). I'm using the latest NVIDIA drivers (260.89) I am seeing excessive flicker in both TCMD as well as some of my applications. It only happens when TCMD is running. Usually something else must be on the screen, such as Thunderbird or a Cygwin X window, but I'm not sure exactly what combination it takes. Up until today, I thought it was just the TCMD window that flickered, but today I had Quicken running and another application I use and *that* other application was flickering as well. The flicker isn't black/white, it's more like a "vibrating". I have never ever seen this problem with TCMD11.