I recently bought a Sony KD-28DX200 TV. I have noticed that sometimes certain dark clours "flicker", usually darkish greys, greens & blues. It looks a bit like someone is nudging the contrast up & down slightly. I have managed to minimise this by fidling with the brightness & contrast controls. This is the first 100Hz TV I have owned and was wondering if anyone else has come across this problem or whether there is something wrong with the TV. Any comments or assistance would be much appriciated.