I recently purchased the Panasonic TH-50PZ800U, and let me tell you it is awesome. I am however having a problem with one of the channels. I currently have an HD antenna and when I tune in to NBC-HD I notice that there is a yellow line on the far left hand side that runs from the top to the bottom of the screen. This problem doesn't occur when watching movies or other HD channels. I don't know if it is my TV or if it is the channel. I thought I would ask someone that knows more about this unit than I do. There is still time for me to return the TV, what should I do?