I'm sorry to hear that you're having an issue with Judder control.
You might try changing the AutoMotion Plus settings to see if that helps. With your remote, press:
Menu > Picture > Picture Options > Auto Motion Plus > (Try Standard or OFF) + [Enter]
Does that help?
i just purchased a samsung 40 inch series 630 lcd tv. i now know what the term judder means. it is impossible to watch with the judder. i tried all the suggested settings on the set itself and none help. my prior tv--sharp aquos 37 inch lcd--didnt have this problem at all but on that tv there wasnt an hdmi cable. however, i have a sharp aquos 46 inch lcd w/hdmi cable and it doesnt have the judder either. is there anything i can do or is this tv just bad for judder? can i try it w/out hdmi to reduce quality/resolution? i am not super advanced in the tech world so searching for any solution before i punt the new tv.