i think it is LCD's problem, bcuz i am using Samsung LCD, with Sharp BD-HP20, no problem watching The Dark Knight. My fren bought a new Panasonic LCD that time, and i brought my Sharp player together with same HMDI cables to play the same movie on his Panasonic LCD to let him feel the HD sensation, however the picture appeared to be grainy, very obvious. May be it's the setting of LCD, i dun know, but i'm very sure that same BD disc, same cable, same player, played on Panasonic it became grainy.