Minecraft wiki entry for Development_versions, associated text: MC-96 – using the number keys to move an item out of a furnace does not give XP.
MC-256 – Mobs can still revert farmland to dirt even if mobGriefing gamerule is set on false.
MC-498 – Setting an enderman on fire with flint and steel, or lava, will not make it teleport away.
MC-721 – Animals on fire do not flee.
MC-1140 – Boats always get placed in the same direction and not based on how they get placed.
MC-1240 – Endermen cannot dodge flame arrow. When the arrow is shot the Enderman moves out of the way but is still set on fire.
MC-1311 – When entering the Nether, the game auto-selects the first item on the toolbar.
MC-1847 – Leaves have the incorrect tool tip.
MC-2145 – "Drowning" in Creative mode.
MC-2504 – Enchant command cannot enchant with ID 0 (Protection).
MC-3332 – The XP level-up sound, which appears every 5 levels, does not play.
MC-3490 – Minecarts and falling entities flicker.
MC-3501 – Passive mob spawn eggs are not consumed upon use.
MC-3565 – Endermen do not open their mouth when attacked by other mobs.
MC-4069 – Pressing F3 + B displays hitboxes rendering invisibility potions useless.
MC-4117 – The wither can sometimes destroy its own star due to the posthumous detonation of wither skulls.