After a few days with my Pro, I've been noticing that every time I put it down on a flat surface it slides on a bubble of air before coming to rest. It nearly slid off my table once because it's almost imperceptibly not level. This happens both in and out of the silicon case. When I press down on the center of the iPad, suction is created and it sticks to the table. This is driving me nuts and I'm curious if others have experienced this.