is this a common problem?? I'm loving everything about the surface pro EXCEPT for the fact that the type cover on my unit periodically stops responding. I have to pull the cover off and re-attach it to bring it back to life. not a big big deal but in class it's very distracting and in general drives me banana sandwich!! I've searched and read quite a few threads (but not on this board) of this happening. tried all the suggestions such as cleaning the contacts with alcohol, etc, and even swapped out the cover for a new one and same thing.