Brightness control (by 9 users)

I bought a the Sharp Aquos 42 inch from Sears in March. I noticed that the brightness would flicker from dark to light (back and forth)during a night scene. It's bad enought that it makes me dizzy and when it's dark I can't see anything. Sears tried to repair the set but couldn't, and then replaced it with the same model. The second set is doing the same thing. I called Sharp and they sent me an authorized repairman. He took the TV into the shop and the next day I was informed that unfortunately that's how this model is and there is nothing they can do. I can't accept this form a $2,000 TV. They said that's from the brightnesss control which unfortunately can't be turned off. When I turn on the OPC feature the screeen just goes dark and dull. The technician from Sears and from Sharp agreed thet the picture was too dark and they both saw it flicker from dark to light and back to dark (over and over), yet they said that no one else has complained. I find this hard to believe. Is there anyone else out there with this problem? I know it's not just me--my family, friends, and 2 technicians saw the problem. If someone out there has a solution--great. Otherwise I have to start fighting with Sharp and Sears on Monday. I wish I bought a Samsung.