May be late since multiplayer will change soon, but... In survival mode on multiplayer, the player who joins onto the server can take a fall from water level all the way to dry bedrock, full speed, without taking any fall damage. This seemed to happen about 4 times out of 5. To reproduce, dig a deep hole, have someone join you, and have them jump to bedrock. The phone is a Nexus S 4G. Thank you!