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).

PVP

• Vehicle
  health and damage output in Strand of the Ancients and Wintergrasp now
  scale with the item level of the operator's gear. Power scaling is now
  1% damage and 1% health per average item level.
• All
  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.
• The bonus honor for winning the battle in Wintergrasp and
  controlling/destroying towers has been reduced.

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.
• Ghoul Frenzy: Now has a 10-second cooldown.

Druids

• Innervate: This ability has been redesigned to grant 450%
  of the casting Druid's base mana pool to the target over 20 seconds.
• Improved Moonkin Form: Now grants 10/20/30% of spirit as
  spell power.

Hunters

• Disengage: Cooldown reduced by 5 seconds.

Mages

• 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.

Paladins

• Blessing
  of Wisdom and Greater Blessing of Wisdom: Now grant 92 mana per 5
  seconds to prevent being overwritten by Mana Spring Totem.
• Exorcism: Can no longer be used on player-controlled
  creatures.

Priests

• Divine Hymn: Healing and healing scaling reduced by 30%.
  Buff on affected players changed from 15% to 10%.
• Renewed Hope: Effect can no longer be dispelled.
• 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: Now
  increases the damage done by your Incinerate and Chaos Bolt by
  3/6/9/12/15% on targets afflicted by Immolate, and increases the
  critical strike chance of your Conflagrate by 5/10/15/20/25%. In
  addition, the increased critical strike chance of Conflagrate provided
  by this talent no longer requires the Immolate effect to have 5 seconds
  or fewer remaining on the target.
• Nether Protection reduced to 30% damage reduction, down
  from 60%.
• 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.
• Shadow and Flame: Now also includes Shadowburn.

Warriors

• Juggernaut: Critical strike chance bonus reduced to 25%,
  down from 100%.

Items

• Arena weapons with an item level of 239 have had their
  rating requirements increased to 2350.
• Darkruned
  Battlegear 2-Piece Set Bonus: The bonus critical strike chance for
  Frost Strike and Death Coil has been increased from 5% to 8%.
• Furious
  Gladiator's Staff and Furious Gladiator's Greatstaff: The agility
  values on these two items were too high. They have been reduced by 50%.
• Glyphs
• Glyph of Innervate: Has been adjusted to grant the Druid
  90% of his or her base mana pool over 20 seconds.
• Glyph of Mass Dispel: Now only decreases Mass Dispel cost
  by 35%.
• Glyph of Rapid Charge: Reduced to 7%, down from 20%
  cooldown reduction to Charge.
• Guise
  of the Midgard Serpent: The base attack power on this item has been
  lowered to balance it against items of a similar quality.
• 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 Garb 4-Piece Set Bonus: Chance for Insect Swarm
  to trigger an instant Starfire changed to 15%.
• Scourgeborne Battlegear 4-Piece Set Bonus: The runic power
  gain has been reduced to 5 runic power from 10 runic power.
• Ulduar 10-player hard mode weapons have been updated to
  item level 232.

Professions

• Fishing
• Jewel of the Sewers: You can now fish in all parts of the
  Dalaran sewers for this quest.
• Phantom Ghostfish: Can now be caught from Nettlefish
  schools in Sholazar Basin.

Bug Fixes

• Death Knights
• Anti-magic Shell: Tooltip error corrected.
• Blood
  Boil: If no target is available for Blood Boil to hit, the spell will
  now cast and consume a blood rune but generate no runic power.
• Druids
• Maim: Rank 2 of this ability is properly considered a
  stun and can be escaped by Blink.
• Hunters
• Go For The Throat: Explosive Shot critical strikes now
  trigger this talent.
• 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.
• 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
  cancelled 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.
• Professions
• Tailoring
• Swordguard Embroidery: Now correctly increases ranged
  attack power.
• Dungeons and Raids
• Ulduar
• Hodir should now reset in a timely manner if a group
  fails to kill him.
• 10-player bosses that drop Runed Orbs will also
  sometimes drop the recipes that use those orbs.
• The Spark of Imagination: Characters that release in
  part of the boss room will no longer be ported to Westfall or The
  Barrens.