My first 13" Air, bought in March 2011, was creaky and just didn't feel as solid as it should. I ended up selling that one (to get my backlit keyboard back when the current gen was released), and I didn't notice it on that one. Ended up taking that back to the Fruit Store a few days later for a defective USB port and now this, my 3rd Air, is flawless. Completely love it!