Just bought this tv, and the pictures looks great. But, when playing a widescreen dvd I notice that at the bottom and top of the letter box there is a line the length of the letterbox that is much lighter then it should be and it becomes annoying cause you know it is there. Typically with CRT sets the picture stops and the black of the screen starts. Anyone else seen this. I took the tv back, got another and it does the same thing?