I am teetering on the edge of buying a plasma. But then I read something about being able to burn an image into my £5,000 plasma screen in as little as 20 minutes!! With Channel logoS and various dogs etc over which I have no control, what happens if I watch a two-hour film on a station with no adverts and a channel logo? Like BBC 3 for example? What if I want to play games on it? They always have something on the screen that doesn't change. And you can evaporate hours before you know it! I am really doubting the wisdom of buying a plasma Am I being paranoid?