Hello. I've got a few questions about my television: 1) Just recently, while using the THX Optimiser Menu, I've noticed that the left and right sides of the screen tend to distort the image. Specifically, when ever a straight line appears on the left or right, it is desplayed as slightly curved. That same line would appear perfectly straight anywhere else on the screen. Is this a problem with the picture tube that can't be fixed? 2) If not, can it be fixed through either the service menu or by a repairman? Thanks in advance!