Minecraft wiki entry for Development_versions, associated text: MC-80041 – Signs with long text freeze the game.
MC-134777 – Using bone meal on kelp doesn't do anything, but still wastes it.
MC-136023 – Phantoms attack players in spectator.
MC-136157 – Explosion radius increased.
MC-136208 – Scute is not affected by doMobLoot.
MC-136226 – Mobs require 2 blocks of air to spawn at all times now.