I need someone to help me test a bug. So far, I have tried two different 2012 MBA's on 2 different Thunderbolt displays, with the same result. Essentially, when the GPU and CPU are being taxed, the sound coming out of the Thunderbolt slowly gets more and more distorted. It starts out fine, but slowly the sound degrades into static, until it's unlistenable. If l click from "Display Audio" to "Internal Speakers" the sound is fine, and if I wait 10 seconds and switch back to "Display Audio", the sounds is fine but then builds right back up to the distortion. I've been working with Applecare on this, and so far they first replaced a Thunderbolt display, but a new display had the same problem, so then they replaced the Macbook Air... but there was still the same problem. I have installed NOTHING on this computer. I also disconnected all keyboards/mice/network cables, etc etc. So I've replicated the bug a bunch of different ways, but one consistent way is to restart the machine, and then start a song, and open up photobooth and set it to record a video. Within a minute or 2, the distortion starts up. If you have a game like diablo3 or minecraft, these will also trigger the bug (if you have it). I had minecraft installed to test things out, and it would also trigger the problem, but I then did a clean restore to rule that out, and the problem still persists, on two 2012 MBA's on 2 different TB monitors. How is that even possible? Also - I have a 2011 MBA that I use on the same TB display, same keyboard/mouse, and it's never had a problem like this. So if anyone can run a test to see if ANYONE else can replicate this problem, that would be great. Apple has been very helpful in replacing the Monitor, and then the computer, but I don't see how I could have the same bug twice, where I've ruled out everything I can. I am having the same problem now on a totally new pair of monitor/computer, with no software installed??? It just baffles me. I am wondering if there is a problem with the ivybridge interaction between GPU and audio. If someone could run through the scenario for me, that would be really awesome. I can't just say "Well I'll ask for an exchange" since I've already done that with the computer and the monitor.