I have a 15 month old Toshiba 50H81. My wife noticed a problem tonight when she was watching the tennis. I played around with it and sometime in the last 24 hours the brightness has changes dramatically. The previous contrast/brightness setting on avia was 30/58 (out of 100). The setting after redoing avia tonight are 23/98. Now I know contrast has changed but I had to push brightness up to 94 before I even touched contrast. Thats a change of 40. Any ideas what could have changed in a day? Are my picture tubes going? I'm also noticing something strange with green. When looking at the blue bars the yellow is green not blue. Is that wrong? I can't remember seeing it before. I also noticed in the color decoder checking that none of the green boxes match the background. They are not green enough. Kind of yellow. I'm obviously concerned about what this means for my set and it's future. I won't be able to push brightness any higher if this happens again.