Not exactly.
All menu screens flicker, even when video is not playing. Examples are EPG screen, or TV/Recorded programs.
During playback, it's acceptable. Seeking is slower when using madVR, but otherwise quite okay.
What I can't recall by heart right now is, whether flickering appears before watching something. I am sure it's there after stopping liveTV or some recording.
I will gather logs as soon as I can.
Netherlands