Yes, it's surprising how many 'books (and windows laptops) have been afflicted with this same problem. I can't believe that, with such a long history of failures, laptop manufacturers haven't devised a more robust method of getting power. The clamshell's power connector is especially fragile, with simple surface-mount connections that are pretty much guaranteed to fatigue loose over time.

Then again, it's absolutely brilliant. They're probably diabolically designed to fail somewhat outside of the warranty window, guaranteeing a steady stream of income from repair and/or replacement...