Minecraft wiki entry for Development_versions, associated text: MC-116357 – Some items appear multiple times in the recipe book
MC-116365 – The "conditional" setting no longer works for command blocks
MC-116372 – Chain command blocks set to "needs redstone" still executes without signal
MC-116388 – Chain command blocks can clone themselves to create an infinite loop which freezes the server
MC-116398 – Crash when changing dimension/relogging with a full inventory
MC-116432 – Server crashed when leaving items on crafting table with full inventory