Minecraft wiki entry for Development_versions, associated text: Mob steps can be heard again.
Players can fill buckets while underwater, even in creative.
Fixed it so that potions of harming will kill mobs rather than just making them drop loot.
Replaced placeholder with the correct names of items.
Guardian & elder guardian attack animations are visible again.
Fixed attribute inconsistencies in mobs & fixed multiple attribute loading bugs (some mobs ran too fast, some mobs had incorrect health, some mobs didn't show the correct health in their health bar.
Fixed crash after joining a LAN game.
Fixed randomly breaking boats.
Monster spawner no longer crashes the game when difficulty is set to peaceful.
Fixed a crash when a player threw a snowball, egg, or splash potions.
Zombie pigmen are no longer hostile towards mobs.
No more diving when riding a horse, pig, or donkey.
Guardian laser beams change color now.
Markers on maps now correctly show direction when riding (animal, minecart, etc.)
Gamerule settings now persist in saved games.
Fixed issue where some mobs dropped no items.
Players again spawn in "safe places" during initial world generation.
Players no longer float above beds while sleeping.
Fixed crash when server spawns guardians & elder guardians.
You can hear the laser sound for guardians & elder guardians again.
Fixed items dropping from mobs incorrectly (not dropping for some, dropping for some that shouldn't have drops)
Chat window fixed- automatically updates messages when they come in.
Two zombie villagers no longer spawn when a single villager is turning into a zombie.
Status effects no longer present after a player's death.
Nether mobs no longer lose fire resistance.
Fixed projectiles so they can be shot in directions, not just at targets.
Invisible players can no longer be seen and attacked by mobs.
Creepers now make hissing ignition sounds again.
Iron golem now has an attack animation again.
Lightning strikes have sounds again.
Fireballs fixed: Blaze fireballs set blocks on fire & large fireballs are visible again.
Fixed assorted crashes when loading/importing older worlds.
Projectiles no longer hurt the player when reflected.
Iron golems will attack aggressive mobs again to defend villagers and themselves.
Fixed rare case of mobs spawning without heads.
Fixed slime spawning size issues.
Zombie pigmen are again spawning with golden swords.
Elder guardians now attack the player.
Player no longer gets disconnected from the Realm after suspending & resuming the device/game.
Fixed a crash that can occur when a skeleton horse trap is triggered on peaceful.