As you may have only one player you need a second to see if it's the player or the media.
I recently purchased a DMP-903 blue ray player. I began playing disc 3 of my Desperate Housewives sets. On 1 out of 4 episodes on the disc two of the scene s have picture break up, where blocks appear in the frame. I put the disc in two other DVD players there was no pixelation. I also tried it on a Sony blu ray player and still no pixelation. I know I was told that my blu ray player has a very sensitive lens so things that could not one player could bother it. The pixelation occurs in select scene s each time. Could someone please put my mind to ease? I would hate to feel I have to return a brand new blu ray. Please help.