So I've had a few problems with mine, but this is the one where I am now forced to take it into the store. I am lucky I got the Apple Care protection plan with my Retina MBP. I have tried two different magsafe 2 chargers and in 3 different locations. It will not charge. I have done a PRAM and SMC reset, I have tried in Bootcamp (Windows 8) and Mac OS 10.8 latest update. Along with this problem I often get graphical artifacts in OSX and weird screen flickering. I called Apple and troubleshot with the nice lady on the phone. She gave me a case number and asked me to take the computer and charger into the Apple store and present the case ID. I am going tomorrow, what can I expect?