I notice the same thing on my 55813. It's more noticable when I'm standing up and I walk up to the TV. It's like it starts in the middle as a point and then fans out. My Pioneer didn't have it so when I started noticing this I went back to sound advice and looked at all their floor models and all of them had it so I just figured it was normal with this TV. I don't notice much if any when viewing it in my normal position but if I look for it I will see it. This set is going back anyway because I have bad crt's in it and waiting for the Samsung 74 series to come out so I can decide which DLP to get.