I bought this monitor in August and have a couple of general questions, if anyone can help: 1) When I try to watch a DVD in Cinema Mode (which switches a letterbox to 16:9, filling the screen), during dark scenes the screen is full but once in a while when a daylight scene comes on, it automatically switches back to letterbox format, Cinema mode still on...really annoying. Why? Is this common? 2) It has a Perfect Focus feature and also Manual Convergence? Which is better? I have made the time consuming Manual Convergence adjustments and just now did the Perfect Focus feature and they both look the same to me. Did I waste time with the Manual process? I was thinking about "calibrating" with one of thos professional DVDs but am afraid it might be more wasting of time. Will one of those DVDs really make a difference in picture or are those differences only noticeable to a super duper expert? Hope you guys can help! THX!