Complain. If no-one complains they won't do anything about it. I went to see Quantum of Solace at a UCI cinema recently and there were some lines down the side of the screen. I mentioned it on the way out to a staff member saying that for the money charged the picture should be flawless. The manager came over, agreed (said they'd ordered a new print), apologised and gave me a full refund. Roll on digital projectors. When are they rolling them out in this neck of the world?