I have a 2013 model 51" Samsung plasma and never had problems with burn in. Only if i leave windows desktop on for hours on with white windows open i might see left overs but they go away quickly with normal use. I'm suprised you have run into this problem with a recent top of the range panasonic plasma which are considered the best plasmas on the market nowdays. Like others have stated maybe your settings are too "hardcore", i've set my plasma researching nerdy forums for best cinematic settings that do not oversaturate anything. Problem is you can't really blame developers for this, it is a well known issue, mainly with older plasmas though. Almost every game or tv channel has some static picture in them. I also use a pixel shifter though i don't think it does wonders, if something is a few pixels thick of white then shifting will still leaves areas unaffected by it. Well i hope your screen will return to it's former glory, plasmas ftw!