Brand new to the forum and just purchased a 7100 panel from Costco. We hooked it up yesterday but never got it working right. I think there might be a defect in the unit. I know the cable box works fine since it worked with the Sony we had previously hooked up and now is hooked up again. The problem arose when we hooked up the new Samsung 60" unit. The image was shifty and overlapped frames a lot (not sure if this is "judder") It was almost like the frame got stuck in memory, then displayed as a flash about 1-2 seconds after it aired. It happened A LOT. Like every 4-5 seconds. Even on stationary, not a lot of motion TV. I tried everything I could even turning off all the All Motion Plus settings. It wasn't exclusively the HD channels either. This happened on the standard channels. Everything was hooked up via HDMI. The Comcast box was a Scientific Atlantic 8300 STB. I've boxed it up for return / exchange. Do you think this is a faulty unit or something else? I couldn't see any differences when I turned off the motion and blur controls at all IMHO. I posted a video to the Samsung USA Facebook page last night showing the problem.