So, I got my Apple Watch Friday (38mm), and absolutely love it so far. I (very carefully) took the straps off, to explore the case. Now the lock mechanism broke. The top band now slides freely all the way across. I can't take this to play tennis tomorrow, as I fear the watch will fly off when swinging the racket. If this were later in the lifecycle, I could have swapped it out in the Apple Store. I've been reminded of the risks of being an early adopter!! Anyone else with this issue? My watch: 38mm Steel Case with Classic Buckle.