I just bought a panasonic plasma tv and was wanting to know if anyone has had a problem with this burn in issue. The issue is when you have a station logo that stays on the screen for an extended period of time it will burn into the sceen and always stay there. Has anyone had this happen?? How long did it take for this to happen?? I didnt realize untill I bought this tv and am now conscious of it how many stations have there logo always on the screen.