Minecraft wiki entry for Development_versions, associated text: Chunks shouldn't fail anymore to be saved.
Fixed (again) the black screen problem on Android.
Fixed a possible crash on clients when the server quits the game.
Fixed growing crops not being saved.
Fixed empty chests and mob spawners found in mineshafts and strongholds.
Joining a world as a client doesn't reset the spawn position to the log-in position anymore.
Mobs don't disappear anymore on clients if the client selects "Peaceful" difficulty.
Clients on "Peaceful" don't auto-heal anymore if playing on a "Normal" difficulty server.
The underwater fog now has the correct color in swamps.