Elytra Bugs MC snapshot 15w42a Infinite Flight and Upside down playermodel

When you use the elytra in MC 15w42a, you're upside down in the inventory, the playermodel is upside down. And I'm not sure if this is a bug, but you cant create roads from dirt, only from grass blocks. And when you fly and go down, and then go up again with the elytra you can fly for an almost infinite time.