Hello, I got a MacBook Air 2010, a couples of months ago and I noticed yesterday that 4 keys are cracked. I came to an Apple Store to report the problem and they tell me that they have never seen this before so it's my fault. They say that I probably left something on le keyboard before closing up. This is simply impossible and honestly who would do that?... my Air is A1. If I had left something on the keyboard, how come that my displays mirror and my hinge are perfect? Have you heard anything about this before? What can I do?