Watching the football on Sky yesterday I noticed a very (and I mean very) slight shadow/ edge to the graphics Sky has for the score & time at the top left of the screen. I am not overly concerned by this, as it's not noticeable from a distance. However, I'd prefer it not to be there. Do I need to perform calibration of some sort to eliminate this? I've read on here about discs you can buy to perform this - I've no idea what that is all about, and how you use them so any pointers would be great (I realise there is a bit in the sticky about this) I have a 42 PV500 Cheers.