I am a new owner with the HR20. I am getting lots of pixelation issues on 520 (MAX) with some movies. Other channels like MGM-HD so far have been perfect. I am not sure but I think the pixelation issue could be related to the sound. It seems if I am watching an action movie where there is a huge sound effect the pixel problem starts and it won't stop until I hit pause, wait a few seconds and hit play. Most of my signal strenths are in 90's except for 99b there I am in the mid 70's.