Hi, I have a MBP which is less than a year old. The adapter's insulation started showing lot of compression at the connector a month back. This became so bad that it split. As shown in the pics. I have used the adapter in normal way. I used to roll it around the adapter when going to college everyday. Thats the only thing that i can think of which might lead to this kind of compression. Is this kind of wear and tear common? I went to Apple store and they told user wear and tear and cannot be covered under warranty. Was pissed of for a while because I though Apple took care of these kinda design issues . But then again, I might be doing something wrong, so let me know what i should do to avoid this in future. This adapter is ruined and have to buy another one and I do not want this to happen again.