Is this normal? My new 6X11's gray cover peels off like this. The top part seems to stay connected (I did not pull out any further). My 9X12 does also exhibit the similar peeling off at the lower right edge. If it peels off altogether, do I have to glue it on to the main unit? Or, is this a defect? This is the peel-off pix. This is the close-up on the tablet surface; you can see the gray cover is off the surface. But, the top part seems to stay put with the tablet main unit.