I own a Panasonic Tau PG3650 which still has one month to go on its warranty. I've noticed that when the TV picture is very dark (e.g. night time shots) and a lamp is on near the screen there appears to be a 'film' of some type visible on the screen - the closest description I can come up with is how petrol looks in a puddle. This appears to be on the INSIDE of the screen - is this normal ? - could it always have been there and I haven't noticed it ? - TV appears fine otherwise - If anyone has any experience/knowledge of this they could give me I'd be infinitely grateful!