I posted a similar topic recently in "audio/video sources" because I thought I might be having a problem with my DVD player(s), but now I think the problem lies with my Samsung DLP. I have had a problem with blocky background images from the first day I set up my DLP, but running an Avia and DVE calibration with my Denon DVD-1600 seemed to help, though not entirely solve the problem. Now that I have also calibrated a new Oppo DVD player (running through DVI/HDMI), I am finding the problem is even worse. I was hoping the Oppo would eliminate the blocky video, but it seems to have accentuated the problem. Here is a description of the problem: I watched "Stay" tonight using the Oppo, and the "blocky" video was apparent in most scenes. When there are large areas (15% or more) of the picture that are mainly one shade, these areas are blocky (not smooth) with one or more jagged transitions. The transitions are mostly horizontal and represent a slight but distinct change in shade, and the transition itself is in motion even when the video is relatively static. It is most noticable with background images, grayish shades, and when the overall image is somewhat dark. It has gotten to the point that I am having a hard time enjoying movies. From my description, does anyone have a guess as to what problem I am experiencing ??? Is this what is called "macro-blocking" ? Also, is this problem pretty typical with DLPs ? I don't want to have to set up a service call, but I am not sure what else to do at this point. Would it help if I tried to get a screen shot and posted it here ?