Does this happen to anyone? I have a rMBP and a 24'' LED ACD. Sometimes when I plug in the ACD (plugging in the power, thunderbolt, and USB) into my rMBP, the laptop freezes. The monitor turns on and becomes the main monitor, but it just freezes. This happens around 1 in every 4 times I plug the monitor in. Also, it only happens when the USB cord is plugged in. I tried disconnecting all of my accessories as well and it still freezes. Any ideas?