Books still have an NBT tag (RepairCost of 0) after removal of enchantments using Grindstone

Mobs' pathfinding is confused by grass paths

Input lag from mouse and WASD controls

F3 + A will always make you walk left slightly

Multiple music at once

Workbench icon appears in place of the grass block icon with new launcher in 1.6+

Baby mobs' hat layers (i.e. on zombie pigmen) don't render

Passive mobs randomly stop following me sometimes when I hold wheat/carrots/etc.

Slabs beyond data value of 7 are placed as upper slabs / named "stone slab" regardless of type

Maximizing/minimizing the game causes death message buttons to go dark

Sheared sheep are always white!

Double-slabs obtained from commands place as double-stone slabs regardless of type.