I'm not sure wether this problem of mine will be able to be rectified but i woundn't mind knowing why its happening. Basicly when playing DVDs through my PS3 i sometimes get a blocky sought of effect mainly in dark scenes or foggy/smoky scenes, it doesn't ruin the whole picture but its there and can be quite noticable at times. I've never noticed this with my old dvd player. I've set the PS3 to 'normal' to turn off the upscaleing to try and rectify this but it hasn't worked. I'm using a decent HDMI cable which is connected to a Panasonic th37px60.