I've been having problems with my macbookpro's power cord.
It's been gradually seperating at the joint where the magnetic connection meets the cord.
There is a little collar that covers the area, but it didn't seem long enough to hold it securely, and when I looked on the Apple website sure enough there were a fair number of complaints about it, along with the info that it wasn't covered under warranty.
So when i walked into the Apple store in Bluewater , brandishing my burnt out cord [ yes it got that bad ] ...
See :(
... I didn't expect to get away without a dent of £59 in my bank balance.
But joy !
They've re-designed it
If you look carefully you can see that the collar is longer on the new one.
So they changed it under warranty.
*does a happy dance*