Personally I dont understand what the problem is.. I have 1 deed pixel on my 300 ... Actually its not really dead, just malfunctions every now and then.
Its the nature of LCD technology that at some point I will get a dead pixel , I also have an LCD monitor, which also has one dead pixel , I also have a work laptop .. that .. you guessed it .. has one dead pixel ... .
If I sent my 300 off now , I will more than likely get another unit , which in a months time will have a dead pixel ... In other words I will end up sending PJ's back more than I actually use one .. .
I cant even see mine from the viewing disstance, so until I get a few more , or until I have used my PJ sufficently to send it back (lets say 11 months or so !) , then I dont see the point ...
Its like the two horizontal lines that appear on every Sony TV made in the last ten years (trust me , they are there) ... I cant see them , but if I replaced my TV , it would be the same ...
Dead Pixels are a 'design feature', live with it ...