I've seen the same thing myself. It seems to cause some bad interactions with image stream tags (i.e. sha256-based references result in pull failures), but on the plus side, you can use all those images on Docker Hub that were pushed with 1.10 or later. On balance, I'd say it solves more problems than it creates. We're running our production OpenShift cluster with 1.10, and it's worked out pretty well for us.