I wonder if this applies to the problem I've had ever since I've gotten a MBP in the fall. I am now on my 4th charger. No matter how I handle the adapter, it still manages to stop working within 3-4 months. The first one was probably my fault as I didn't keep the brick as ventilated as I could've, so I think it eventually fried itself.
The second one is still a mystery as I tried to use it one day and it didn't work. No LED, no charge. The third one had a slow death where it would take more and more jiggling and manipulating the cord to get it to work.
I don't get it. I wrap the cord around the little hinge things they have, keep them ventilated, and they still crap out on me. By far my biggest gripe with this MBP. If anybody else found a reliable way to stop this from happening, please let me know.