I recently got mtself Sony SXRD 50" HDTV projection TV. Most of the time while watching (not through HD source) SD or satellite which is 480i, or even stnadard dvd, picture/video seems to be constintly going in/out of focue. It's not that bad but rather noticeable if watched closely. I still don't have HDTV source so not quite sure if I'l have same issue but this is defintaley starting to concern me. Is this focusing issue normal?