I have an Hitachi 57f500 and Sony DVD player. While watching rental DVD's I have had white flashes appear around the edges of the screen. This has happened with three different players. I don't think it is the TV because it only happens during DVD's. It doesn't happen with DVD's I own except after I watch a rental disc. Then it happens, but eventually stops. Just wondering if rental discs are causing some sort of damage or if anyone else has heard of this happening. It is extremely distracting and I have not had any luck with the manufacturers. Thanks in advance.