Minecraft 1.8.1

Dropped anvil makes no sound when it breaks

Mobs temporarily glitch out of fenced areas / into blocks

When scaling a map with paper, shift-clicking on it won't apply the correct scale level.

3rd person view reverts to 1st person view if head inside a block (corner a one block wide tunnel in a minecart, ride on a horse through a block, piston...)

"/spawnpoint" command fails directly on Pressure Plates, Cobwebs, Signs, Open Fence Gates

Ghost boats

Creating or loading a singleplayer world shows the main menu for a brief second

Fall damage is ignored for a couple of seconds when reloading into LAN or singleplayer worlds

The portal travel sounds travel.ogg / trigger.ogg swapped / played at wrong time

Most text boxes / chat / scroll bars revert when the window changes size, fullscreen mode is toggled, or fullscreened game is tabbed into

Duplication and deletion of hotbar items in Creative using number keys

Worlds not saving upon exit (single player)

Experience orb position client-server desync

Compass points wrong direction after returning from nether

Pets disobeying sit commands by helping player when attacked and within a certain radius

Eating a food item / drinking potion / curing zombie / feeding animal has a chance of also consuming a second food item / potion without any animation

Server lag in singleplayer

Boat inflicts fall damage if it runs aground in some fashion (Slabs, Mobs, Soul Sand)

Clouds are transparent when you are above/in them but not when you're underneath them.

Walking on blocks less than 1 block tall placed on ice, slime blocks or honey blocks acts like walking on ice, slime block or honey blocks directly

Whether or not a player experiences some effect is calculated based on the block under the center of the player

Lily pad sometimes destroys water block

Head rotates in the wrong direction while riding

Arrows shot at the top half of a door will float once the door is opened

Mob hitbox still exists during death animation

Dropped anvil makes no sound when it breaks

Mobs temporarily glitch out of fenced areas / into blocks

When scaling a map with paper, shift-clicking on it won't apply the correct scale level.

3rd person view reverts to 1st person view if head inside a block (corner a one block wide tunnel in a minecart, ride on a horse through a block, piston...)

"/spawnpoint" command fails directly on Pressure Plates, Cobwebs, Signs, Open Fence Gates

Ghost boats

Creating or loading a singleplayer world shows the main menu for a brief second

Fall damage is ignored for a couple of seconds when reloading into LAN or singleplayer worlds

The portal travel sounds travel.ogg / trigger.ogg swapped / played at wrong time

Most text boxes / chat / scroll bars revert when the window changes size, fullscreen mode is toggled, or fullscreened game is tabbed into

Duplication and deletion of hotbar items in Creative using number keys

Worlds not saving upon exit (single player)

Experience orb position client-server desync

Compass points wrong direction after returning from nether

Pets disobeying sit commands by helping player when attacked and within a certain radius

Eating a food item / drinking potion / curing zombie / feeding animal has a chance of also consuming a second food item / potion without any animation

Server lag in singleplayer

Boat inflicts fall damage if it runs aground in some fashion (Slabs, Mobs, Soul Sand)

Clouds are transparent when you are above/in them but not when you're underneath them.

Walking on blocks less than 1 block tall placed on ice, slime blocks or honey blocks acts like walking on ice, slime block or honey blocks directly

Whether or not a player experiences some effect is calculated based on the block under the center of the player

Lily pad sometimes destroys water block

Head rotates in the wrong direction while riding

Arrows shot at the top half of a door will float once the door is opened

Mob hitbox still exists during death animation