I have had one of these sets for a few days now, and I have noticed that when using RGB I am getting horizontal lines moving on the screen. They are fairy faint but very noticable when the room is dark. Called an engineer out and Comet have agreed to swap it for a new one (very impressed with Comets service !). Anybody else have the same problem, hopefully the second set wont do it. Apart from this problem its a great TV very impressed. Why does RGB seem to cause so many problems with so many TV's.