While playing survival, MCPE suddenly crashed. I wasn't doing anything too exciting at the moment; night was falling, I had just put some logs and coal in a furnace, and turned around and started to walk the other direction toward some decaying leaf blocks left from a chopped tree when the game crashed.
Logcat showed an error message from "Surface" that appeared at the same time as the crash, associated with the PID from the MCPE process:
[Surface] using an invalid surface, identity=118010 should be 118011
Tested on an MB855 phone running Android 2.3.5.