Sorry if this question has already been asked and answered but I did a search and found nothing. Occasionally while watching tv and I switch from a hd channel to a standard definition channel the picture on the standard channel becomes stretched from top to bottom and the picture is distorted. Sometimes if I hit the menu bottom numerous times the picture snaps back into shape, if not I have to do a complete reset on the receiver. This problem at first only happenend occasionally but now it happens almost every day!!!!