What the hell @ people who think 'it hasn't happened to me, so this is bullshit.'
My cable popped, crackled and melted through while I was editing a project for work. I do not do acrobatics with my MacBook, I do not wrap the cable in stupid ways. It's either on the desk or on my lap, I'm glad I am not the only one this has happened to. I'd be interested to see if this has happened to the some of the Air's MagSafe cables.