Patch 3.1.2 is a minor patch dealing with bug fixes and balance changes.
Equipment Manager: When enabled from the Interface Options menu, this feature will allow players to store sets of equipment, easily swap between saved sets using hotkeys, and pull items directly from backpacks or bank slots (must be at the bank to equip inventory from the bank).
New art textures have been added for Argent Tournament mounts. Any mounts already purchased from the Argent Tournament vendors will be updated automatically. Argent Tournament mounts with the old textures will still be available for purchase from the Argent Tournament vendors for a small [Champion's Seal] and gold cost (standard faction requirements apply).
Mirror Images: The images summoned by this spell will now target the creature that most hates the Mage, and should no longer cast [Fire Blast] or [Frostbolt] on targets that are affected by crowd control debuffs that break immediately on damage unless they are already casting these spells when crowd control is applied.
Sacrifice (Voidwalker) redesigned: Sacrifices a portion of the Voidwalker's health, giving its master a shield that will absorb X damage for 30 seconds. While the shield holds, spell casting will not be interrupted by damage. 1-minute cooldown.
[Lock and Load]: The tooltip has been corrected to display its actual chance to occur.
[Rabid]: This Hunter pet talent no longer lists a percentage chance to be triggered, as that chance varies by the attack speed of the pet.
[Divine Sacrifice]: Damage done to the Paladin while this is active will no longer cause the effect to break early, and if it is dispelled or canceled early, the damage counter will reset correctly the next time the spell is cast.
[Shadow Dance]: Issues with action bars and ability use arising from using Stealth while Shadow Dance is active have been fixed.