Hi, I bought a sony kd-49xe9005 a few months ago. The picture has been great, but in the past few weeks I have noticed a judder in the picture when the screen changes camera. It was especially noticeable whilst watching the World Cup and today when the kids were watching CBBC. I haven't changed any settings and the tv system is up to date. I am watching tv through a Virgin TiVo box. Any advice would be much appreciated. Thank you.