Ok guys I'm running into something very weird...I bought a buffalo external cd/DVD drive that is Mac compatible and no problems on my 2010 MBA when I had it. I gave that to my sister And got the 2011 and it does not have enough power the light goes red. The cd drive does have a second USB for what they call "boost mode" and when I plugged that in it had enough power. The problem is I had to use a USB power plug because the cord did not reach around to the other USB on the air. So I figure it might just be lion but then I try it on the 2010 MBA which is upgraded to lion and in 1 USB it worked fine. So do I have a flawed system? Or is this years less powerful? Appreciated all ideas. If you read this far thanks!