Just to add my 2 cents. My Macbook Pror Retina (ordered 1st day) has been pretty much flawless until last saturday (dec 8, 2012). I was working on a Final Cut Pro X video --- and it took me a while to realize that the track pad was behaving erratic. Did an SMC reset - no help -- next day the trackpad was still erratic and made an appointment with the Genius Bar for later in the afternoon. Thought some more and tried PRAM reset and viola the machine is fine (canceled the Genius) --- for 8 hour -- until I started taxing it with FCPx again.
Monday I make a new appt and take the machine in. The Genius sees the behavior, powers down the machine and reboots into a clean user account. (I had left FCPx running and the machine was warm when I demostrated the error). In the new user id the problem wouldn't occur. They kept the machine for two days and replaced the ghosting LG screen with a Samsung (Yay!), but did nothing for the trackpad issue. I spent a half an hour with the genius at pickup indicating my reluctance to take the machine back only to have it act up again. It was good for 2 days until today when I was ripping a DVD on Handbrake and finishing the FCPx edits on the Church Christmas Play when --- the trackpad becomes erratic.
Searched for macbook pro trackpad issue and found this thread. Tried the pressue on the two upper corners and the machine is fine -- I'm sure only for a while. I guess I'll wait until its more pronounced and can demostrate the behavior to the genius before I take it back in. My luck they'll replace the whole machine and I'll get a ghosting LG display.
Anyhow, it seems to me this is a hardware manufacture/build/design issue that may be aggravated by long term high temperature operation as experienced by several hours of FCPx. Note: I regularly tax this machine to the limits running Windows7 in VMware, Itunes, Iphoto, Safari, Handbrake and World of Warcraft simultanously and had not had any issues until last week.