Have you tried changing the AutoMotion Plus settings to see if that helps? In some cases, some signals respond better when the setting is set to "Off" or "Clear".
I bought this tv a week ago and i have notice somthing strange when watching regular HD or digital channel.
It seem as if the motion of the charcater speed up for a breif ms sec and goes back to normal as if you watch a black and white 1920 moves.
i have never seen this before .I have change HDMI CABLE, switch cable boxes and the same problem.My other lcd dont do that. So does anyone know what the problem is, before i return it. The the picture quality is excellent.except that issue .