Hello guys, I have owned several macbooks recently. namely rMBP and MBA. They are all silky smooth time it setups up. But today, I got this new rMBP and the very first time it setups, the mouse movement on the touch pad was very jerky and not smooth at all. After setup, I updated the to the latest software and tried to shut down the macbook and what I saw as something I didn't see before. Instead of the light grey color shutdown screen. This one was a Dark grey screen with a spinning wheel. Even though it did shut down after that and the jerky movement of the mouse stopped and now everything is smooth running. but I was worried if this is some kind of issue like a "kernel panic"? or some kind of hardware issue? Would you guys recommend to exchange it for another macbook?