Yes, just noticed a hairline crack running from the top left corner to the middle of the right hand side. It's almost invisible when you look directly at the screen, but it's clearly visible when viewing at an angle. A couple of days ago, it fell off a chaise longue onto a tile floor as I got up (about a 2 foot drop.) There were a couple of scuffs and a small dent in the top left corner. I didn't see a crack then, so it must have developed over time somehow. I'm not sure what my repair options are yet.
RULE #1 - BUY A CASE ASAP; don't wait for the ideal case, get something now. I ordered the Apple case a week ago, but there's still a huge backlog. It won't arrive until the end of June. :-/