My brother just bought a new power adapter for his MBP... why? His old one's magsafe melted! Yup! It's not new news... there are a few articles google'd and in youtube too. My cousin and I realized our's was still OK coz the "plastic clip" that slides along the cable, with which you clip the cable to keep it organized, was always located at the end of the cable, nearest the magsafe. This prevented the magsafe area of the cable from curling up when plugged, which was the main cause of the meltdown. Just a prevention tip for you guys! Be safe!