I have a MacBook which I purchased in Feb 2007. It gets light daily use. Over Christmas holidays in Dec 08, while attending a weeklong family reunion, the laptop was in use almost constantly by various family members. On the drive home, our daughter had the MacBook plugged into the power source in our minivan so she could watch a DVD. She noticed a scorching smell, and realized the plug at the computer end was smoking! That's when we noticed a series of small holes or tears around the plastic coating of the power cord where it attaches to the plug (just below the thicker sheath). The wires inside were twisted together and had shorted out. We went to an Apple store and purchased a new cord. It cost $120!!! While my MacBook is no longer on warranty and I do not have AppleCare, I want to contacting Apple about this. I am wondering if other people have encountered this problem. I notice that the new power cord has a longer plastic sheath between the plug and the cord; it is twice as long as the one on my old cord.