I have a black Macbook C2D and just recently, the cord burned near the Magsafe power brick. I've read about the problem online, but most of the messages I've seen have been from around 2008. Has anyone gotten a free replacement recently from an Apple Store? I don't have Applecare or warranty. I've seen the new Magsafe design with the cord that goes vertical instead of horizontal. Will it block my ethernet port?