I've been fighting my urge to jump back to an Air but a few days ago I decided to pickup an ultimate 13 build at the Apple store for a 2 week test run. After setting up my dev environment and machine I noticed these weird lights near the bottom bezel. If you press on the area they go away for a sec, also they get worse as the machine warms up. Plan on exchanging it but never have seen this issue on any Apple notebook I've owned. Side note, also I notice the anti clear coating they use is like the rMBP, my old Air I gave my wife (2011) had a purple tint to lights as the new Air and Retina screens have no purple tint. Shocking the new one and the 2011 both have Samsung displays and the new one has noticeable better contrast.