I have recently had to replace my macbook pro charger after only 9 months of use. It would only work intermittently and in the end would not work at all. I purchased a new charger 6 weeks ago and this too has now failed. It started working intermittently for about a week and has now totally given up the ghost. Anyone have any ideas as to what is going on here? I will obviously phone Apple tomorrow to complain but I am not going to be without my laptop for a good week and this is a big problem for me.
I'm pretty sure an Apple store would have exchanged it on the spot if you'd have been able to visit, but can't be 100% certain as I've never been in that exact position.