When you fly into the air to look at the masterpiece you were making, you find the perfect spot to get the best look at it. picture perfect. Then, the next day, you enter the world to show him, you find yourself on the ground.
To reproduce:
1. Make a new creative world.
2. Fly up in the air.
3. Quit to title.
4. Re-enter the world. you will fall to the ground.
This also happens in 0.6.1 and I confirm.