So I went to look at my watch last week and noticed black circle on the screen on top right corner, was blocking the clock so very obvious. My watch was bought in June. Seemed to get larger as the day went on. I called Apple and they had me do a screen shot with the watch and it doesn't show in screen shot which meant it was not software but an actual screen defect. They said they will most likely replace the watch since they can't replace the screen because it would void the water rating when they break the seal on the watch. So a box came to my house on Friday to put my old watch in and by Tuesday the new watch arrived. Great service but a bit concerned about what happened to my old watch. Here is a picture of it - you will see it in the top right corner