I have the 42 mm Space Black Sport. Had it since early June, no issues, no scuffs, not one bump or bruise. Yesterday evening, I was standing in my kitchen and lifted my arm and heard a "tink tink" sound hit the ground. Saw the piece on the floor and sure enough, it was the casing of the digital crown. I'm not sure how they are secured to the stem, but it would not go back on or in place. My dad took it to the genius bar for me today and they are sending it out for repair as they had no replacement stock. They had no answer as to why, said it was the first time they've seen it. Could have been worse, I was at an amusement park on Saturday. I would have NEVER found it or noticed it there.