It's been nearly a year since anything went wrong with my MacBook laptop, but overall, it hasn't been a paragon of reliability. The battery, motherboard, fan, DVD drive, and hard disk have all (!) needed service. Now there's this:
UPDATE: It looks like AppleCare will replace the adapter for me, no charge. I'm taking the old one in to a local Apple dealer today.
Right from when it was announced in 2006, I thought the MagSafe power connector, which pops out if you trip over the cord rather than dragging your laptop to the ground, was a smart idea. But the sharp angles and minimal strain relief of the design also seemed fragile to me, and I appear to have been right. I know several people whose MagSafe adapters have failed exactly as mine is: the cord wears through right next to the computer end of the connector.
Conversely, my wife's round iBook connector continues to work just great, even though it is a year older, and it's rare to hear of those adapters failing in a similar way at all. The new MagSafe design for the MacBook Air seems like it might be sturdier, but I don't think the actual power brick is rated for enough voltage for my bigger MacBook.
The pity is, because Apple has patented the MagSafe design and has not licensed it to other manufacturers, you can't buy yourself a third-party MagSafe-compatible power adapter with a better connector. So whether AppleCare warranty covers it or not, I'll end up with a similar flawed design, which may fail on me again in a year or two.