Minecraft wiki entry for Development_versions, associated text: MC-73300 – "Saving Level..." text not appearing in pause menu.
MC-80824 – Spawning in some biomes causes "Unable to find spawn biome" warning.
MC-129912 – Player no longer spawned at highest level at world spawn.
MC-131686 – Spawn in ground with Buffet generation when creating a new world.
MC-132347 – Spawning inside icebergs.
MC-133466 – Certain world configurations force the player to spawn at X=8 Z=8.
MC-185033 – Underground spawn in single biome world type.
MC-185034 – Always respawning on the same block with no spawnpoint set.
MC-198232 – Music plays less frequently as it normally did.
MC-202166 – "Times Crafted" statistics column doesn't always display data correctly.
MC-214288 – Player does not spawn on the surface of the world when min_y is greater than 0.
MC-221641 – Caves can make ravines generate without water.
MC-233771 – Parity issue: Light blocks do not display their light level when shown via a held light block item.