Wow, mine has melted too. It had started to get loose like the wires had come disconnected, and when I looked at it (after viewing this thread), it most definitely has some melted spots. I noticed it was really hot when I was messing with it to try to get it to charge, so I immediately pulled it out. Glad I did! Sucks too because I won't have my computer for school tomorrow, though I'll try the computer store on campus, they're an AASP. Hopefully they're be able to replace it on the spot. I'm afraid to use it now though, since it was hotter than the main part of the adaptor has ever gotten, hot enough to burn if I put my fingers on there more than a second or two. That thing could probably have started a fire had I left it.
jW