I had an ISF calibration done on my Sony KP51WS520 in the middle of May, which included the removal of the anti-glare screen and Duvetyne lining . Recently the picture became slightly green in the middle. However Sony and an Authorized Sony Warranty Service Technician told me that warranty repair is not possible because the ISF calibration, specifically the glare screen removal, voided the whole warranty. I do have a Circuit City extended warranty that covers it for three years after the manufacturer warranty ends. Do you think they will just look at what the problem actually is and, unless they can prove that the glare screen removal and/or the Duvetyne lining is causing the green picture, fix it?