Patch 3.1.2 is a minor patch dealing with bug fixes and balance changes.
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General
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).
Copied Test Realm characters will no longer be copied with their achievement history in order to better facilitate the character copy process.
All Lake Wintergrasp daily quests have been changed to a weekly format. The honor and [Stone Keeper's Shards] rewarded for completing these quests have been increased to compensate.
Classes
Death knights
[Improved Death Strike]: This talent now also increases the healing from [Death Strike] by 25/50% and the tooltip has been adjusted to reflect the actual functionality after the hotfix in 3.1.0.
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.
[Soul Warding]: Mana cost reduction is now 15% down from 30%.
Warlocks
[Conflagrate] updated: Consumes an Immolate or Shadowflame effect on the enemy target to instantly deal damage equal to 12 seconds of your Immolate, or 8 seconds of your Shadowflame.
[Fire and Brimstone]: No longer increases the damage of your [Immolate] spell, but now increases the bonus damage your [Incinerate] deals to targets afflicted by your Immolate by 6/12/18/24/30%.
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.
[Guise of the Midgard Serpent]: The base attack power on this item has been lowered to balance the stat and socket budget.
Increased the health]] and mana restored from Northrend food and drinks.
Most scopes now have a level requirement and will bind the item to which they are applied.
Nightsong 4-Piece Set Bonus: Chance for [Insect Swarm] to trigger an instant Starfire changed to 15%.
Scourgeborne 4-Piece Set Bonus: The runic power gain has been reduced to 5 runic power from 10 runic power.
Glyphs
[Glyph of Conflagrate] redesigned: When you use [Conflagrate], the damage done by your next 3 Destruction spells is increased by 10% for 15 seconds if the [Immolate] on the target has 5 or fewer seconds remaining.
[Glyph of Innervate]: Has been adjusted to grant the Druid 90% of his or her base mana pool over 20 seconds.
[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.
Paladins
[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.
Rogues
[Shadow Dance]: Issues with action bars and ability use arising from using Stealth while Shadow Dance is active have been fixed.
[Tricks of the Trade]: To prevent exploits, this ability can no longer be cast on non-player targets.
Warlocks
[Demonic Sacrifice]: This spell will no longer appear in any Warlock's spellbook.