Minecraft wiki entry for Development_versions, associated text: MC-3841 – Attacking an unsaddled pig while holding a saddle saddles the pig.
MC-8673 – Players killed by Wither Skeletons are shown to have been killed by a Skeleton
MC-36927 – Durability of golden swords occasionally dropped by zombie pigmen is not random (always 25).
MC-46456 – Written books given by command crashes when copied in crafting table if Author is missing
MC-61997 – Squids spawn in lava.
MC-66946 – 2-block tall hitbox on small armor stands.
MC-67406 – Small armor stands display items differently than normal ones.
MC-70424 – Baby zombie pigmen's sword is slightly tilted forward.
MC-80551 – You can place redstone, doors, rails etc. onto 7⁄8 layers of snow.
MC-86130 – Shields change their base color when damaged & repaired / Crafting different in colors results in damage.
MC-87159 – Dragon breaks blocks in far-off locations.
MC-88533 – Marker armorstands cannot properly be tested for with target argument "r=0".
MC-89921 – Elytra not rendered on entities/mobs.
MC-91383 – Horses (now only skeleton horses and zombie horses) drop different amount of loot than before.
MC-92772 – Saddled pigs don't drop saddle with doMobLoot=false.
MC-92776 – Ink sacs are fished in stacks of 1 instead of 10.
MC-93435 – Cobblestone walls are listed in the "Building Blocks" tab.
MC-93609 – Player is floating above the saddle of a mule.
MC-93824 – Feeding golden carrot to breed horse works if InLove is greater than 0.
MC-94476 – Killing rabbits with Looting does not give more raw rabbit.
MC-94947 – Chicken "stepping" sound still works when the chicken is swimming.
MC-95450 – Villager loot table missing.
MC-95469 – Middle click / pick block on farmland gives dirt.
MC-96499 – Boats collide with any entity (arrows, paintings, etc.) even if Marker:1b is on (armor stand).
MC-98146 – Marker armor stand does not render in some cases.
MC-98260 – Water bottles have inconsistent NBT tag depending on how you obtain them.
MC-99602 – Impossible to detect water bottles filled from the ocean in player's inventory.
MC-100950 – Boats can travel / remain on the fog of lingering potion / dragon's breath.
MC-101615 – Silverfish do more damage to players on easy difficulty than on normal difficulty.
MC-101642 – Iron golem / VillagerGolem is holding red flower client side 400 ticks too long.
MC-103339 – Mushroom cows do not path to mycelium, but grass. Causes unintended spawning requirements.
MC-103726 – Marker armor stands are not saved with structures.
MC-105071 – Random green/gray dot in anvil GUI.
MC-106747 – Wither bosses break structure blocks / structure voids.
MC-106842 – Target selector stops parsing its arguments if an entry is not <argument>=<value>.
MC-107054 – lit_furnace item model but no item.
MC-107055 – 2 models for old wooden slab's item