* Arenas
o Ring of Valor
+ The flame wall has been removed.
o Ruins of Lordaeron
+ Two line-of-sight tombstones have been added to the slime pool on the southern side of the map.
* Wintergrasp
o Against the Odds: This achievement has been removed and converted to a Feat of Strength.

Raids and Dungeons

* Ulduar
o An Immortal Guardian targeted for Empowering Shadows in the Yogg-Saron encounter will now become a 'Marked Immortal Guardian' while targeted.
o Crusher Tentacles in the Yogg-Saron encounter spawn a little slower in 25-player mode allowing a bit more time for players to clear out the Illusion room.
o Empowering Shadows in the Yogg-Saron encounter now targets a maximum of three Immortal Guardians in 25-player mode.
o Yogg-Saron's health has been reduced by 20% in the final stage of his 25-player mode.

Items: General

* Items with Triggered Effects: These items generally have cooldowns on how often they can be triggered. Those cooldowns are now triggered each time the item is equipped (example: A trinket has a 45-second cooldown on an effect triggered by player attacks; when a player equips that item, the effect will be unable to be triggered for the first 45 seconds it is worn).

Paladin

* Crusader Aura: This ability now also grants its flying speed increase to a druid’s Flight Form and Swift Flight Form.

Shaman

* A customizable totem bar will now be available for shamans allowing the storing of 4 different totems. These totems can be placed on the ground at once in one global cooldown for the combined mana cost of all 4 totems. The naming scheme of the spells to summon the different totem sets has been changed to make it less confusing for players:
o Call of Fire (Totem Bar 1, the first one gained at level 30) is now named Call of the Elements.
o Call of Water (Totem Bar 2) is now named Call of the Ancestors.
o Call of Fire (Totem Bar 3) is now named Call of the Spirits.
o Call of Earth (the spell to recall all summoned totems) is now named Totemic Recall.

Warlock

* Talents
o Destruction
+ Improved Shadow Bolt: Redesigned slightly. Instead of a 100% chance to apply a 1/2/3/4/5% critical strike increase on the target, it now has a 20/40/60/80/100% chance to apply a 5% critical strike increase.

Warrior

* Talents
o Protection
+ Devastate: Weapon damage and bonus per Sunder Armor on the target increased by 100%.

Bug Fixes (Some of these may not be new; posting entire list because there are a LOT of new things)

* Death Knights
o Anti-Magic Shell: The tooltip for this ability will now reflect modifications from the Magic Suppression talent.
o Blood-Caked Blade: The damage from this talent is no longer normalized to weapon speed.
o Chilblains: Icy Clutch can no longer miss when Frost Fever hits, however, when Frost Fever is dispelled Icy Clutch will also be dispelled.
o Dancing Rune Weapon: The rune weapon will no longer cast Corpse Explosion.
o Desecration: No longer causes unnecessary combat logging.
o Horn of Winter: Learning rank 2 of this ability caused players to unlearn rank 1, such that it no longer appears in their spellbook. It is now possible to relearn that rank, and death knights will no longer “forget” rank 1 when they learn rank 2.
o Lichborne: The buff from this ability can now be cancelled.
o Raise Ally: Using the Gnaw ability while under the effects of this spell will now initiate auto-attack. In addition, the damage done has been changed from a flat value to a percentage of weapon damage.
o Raise Dead: This spell will no longer give two errors when the casting player lacks the reagent to cast it.
o Rune of Razorice: Each death knight can now have his or her own copy of this debuff on the target.
o Rune of Spellbreaking: Tooltip now indicates the effect from this enchantment does not stack with other effects which reduce the duration of Silence effects (including not stacking with a second copy of this enchantment). In addition, now reduces damage from Holy spells.
o Rune of Spellshattering: Now reduces damage from Holy spells.
o Summon Gargoyle: Corrected the inaccurate tooltip which claimed a Gargoyle could last up to 40 seconds, when in fact 30 seconds has always been the maximum.
o Rune of Razorice: Corrected a bug where this applied to frost damage done by others.
* Druids
o Bash: Tooltip now specifies that the Interrupt effect only occurs on non-player targets.
o Bear Form, Cat Form, and Dire Bear Form: Mana energizes that occur while in these forms will now appear in the combat log and floating combat text.
o Cyclone: Victims of Cyclone can no longer receive healing from health drain effects such as Devouring Plague while they are affected by Cyclone.
o Dash: Druids who have not learned Track Humanoids will now retain the benefit of Dash while shifting out of and back into Cat Form.
o Druids should no longer be removed from a form after using any engineered bombs.
o Maim: Tooltip now specifies that the Interrupt effect only occurs on non-player targets.
o Natural Perfection: Now properly triggered by periodic critical strikes.
o Nature's Grasp: This talent will no longer be triggered spuriously by some ranged abilities such as Heroic Throw.
* Hunters
o All ranks of Sonic Blast now properly have an 80 Focus cost.
o Black Arrow Ranks 5 and 6 training costs have been lowered significantly.
o Furious Howl: Ranks 1-5 will no longer give slightly more attack power than is listed in their tooltips.
o Lock and Load: The tooltip for this talent has been updated to indicate that it also works with Explosive Trap.
o Roar of Sacrifice: Damage transferred to pet is now considered Nature damage.
o The tooltip for Improved Tracking has been slightly re-written to indicate that it only works on the hunter, and works on melee damage as well.
o T.N.T. (Rank 3): Now indicates that the talent works with Black Arrow.
* Mages
o Arcane Instability: Tooltip reworded to clarify design intent.
o Burning Determination: Some Silence and Interrupt effects that did not trigger this talent will now trigger it properly, including Bash, Hammer of Justice, Shield of the Templar, Garrote and Gag Order.
o Combustion: Fire spell misses will no longer trigger this talent.
o Conjure Refreshment: Rank 1 food will no longer overwrite the drink buff from rank 2 food.
o Fireball: Periodic damage from this spell can no longer trigger Combustion.
o Living Bomb: Periodic critical strikes from this ability can now trigger Ignite and Hot Streak.
o Mirror Image: The mirror images will no longer complete casts of Frostbolt on targets which are Polymorphed at the time their Frostbolt channel finishes.
o Molten Armor: Critical strikes from the effect on this armor will no longer trigger Ignite.
* Paladins
o Auras: Any paladin aura active at the time of the paladin’s death now automatically reactivates when the paladin returns to life.
o Beacon of Light: Multiple paladins can now have this buff active on the same target. In addition, the beacon target will no longer lose the buff while under the effects of Cyclone or Banish.
o Blessing of Sanctuary: This talent and Vigilance will now both be able to be cast on the same target without sometimes overwriting each other.
o Exorcism: Now properly has a 100% chance to be a critical strike when cast on death knights using Lichborne.
o Eye for an Eye: Now properly triggered by periodic critical strikes. In addition, the tooltip incorrectly stated that 20% damage is reflected, when it is actually 10%. Tooltip fixed.
o Hammer of Justice: Tooltip now specifies that the Interrupt effect only occurs on non-player targets.
o Hand of Sacrifice: Casting this spell on a target with Divine Sacrifice active will now generate an error message instead of wasting the cooldown.
o Heart of the Crusader: The effect from this talent will no longer be removed if a paladin without this talent overwrites the judgement placed by a paladin who does have the talent.
o Holy Shield: It is no longer possible to have two ranks of this ability active at the same time.
o Judgements: All paladin judgements are now properly considered as melee attacks that cannot be dodged, blocked or parried. Previously Seal of Light, Seal of Wisdom, Seal of Justice and Seal of Righteousness would cause the judgement to be considered a ranged attack.
o Judgement of the Just: The effect from this talent will no longer be removed if a paladin without this talent overwrites the judgement placed by a paladin who does have the talent.
o Judgement of Vengeance: Inaccurate combat log tooltip corrected.
o Judgement of Corruption: Inaccurate combat log tooltip corrected.
o Pursuit of Justice: This talent will no longer sometimes be deactivated when leaving a battleground.
o Sacred Shield: This buff will no longer have any effect if the target is another player engaged in a duel. In addition, the heal from this buff will no longer cause the paladin to stand, and it is no longer possible for two paladins to both have the spell active on one target.
* Priests
o Blessed Resilience: Now properly triggered by periodic critical strikes.
o Divine Aegis: This talent will now work properly if the priest moves out of range of his or her target as the effect is resolving.
o Divine Hymn: This spell now works correctly with the trinket Illustration of the Dragon Soul. Mana Burn: Fixed a bug where Mana Burn did not cause fear effects to break when the fear victim had an absorb shield on.
o Mass Dispel: This spell now triggers some types of trinkets it did not trigger before (such as Flow of Knowledge).
o Mind Flay: This spell will now work correctly with [target=focus] macros.
o Pain Suppression: No longer can be cast while under the effects of Incapacitate or Cyclone.
* Rogues
o Honor Among Thieves: Periodic critical strikes now grant combo points for rogues with this talent.
o Killing Spree: Error message when no targets are in range has been changed to “Out of Range”.
o Master of Subtlety: Being under the effects of Cyclone when the buff from this talent is about to expire will no longer make it last indefinitely.
o Overkill: Being under the effects of Cyclone when the buff from this talent is about to expire will no longer make it last indefinitely.
o Shiv: Deadly Poison will now apply properly when Shiv is the attack used to break a Gouge.
o Tricks of the Trade: Using this ability on a target affected by Cyclone or Banish will no longer place the ability on permanent cooldown and will instead give an error message.
o Turn the Tables: Rank 2 of this talent will now work properly with raid members, and not just party members.
* Shamans
o Elemental Devastation: Tooltip revised to indicate it does not work with critical strikes from periodic damage.
o Elemental Focus: Tooltip revised to indicate it does not work with critical strikes from periodic damage.
o Elemental Oath: Tooltip revised to indicate it does not work with critical strikes from periodic damage.
o Flametongue Weapon: Fixed tooltip error.
o Frostbrand Weapon: Fixed a bug where rank 9 was not scaling properly with a shaman’s spell power.
* Warlocks
o Demonic Circle: The visual for this spell should now despawn when the warlock dies or when the warlock otherwise loses the aura that allows transport to the circle.
o Immolate and Unstable Affliction: All ranks of these two spells will now overwrite each other.
o Improved Imp: Each time an Imp is summoned it will recast Blood Pact (if autocast is on), forcing it to benefit from this talent, even if the Imp was not summoned at the time the talent was learned.
* Warriors
o Berserker Rage: Tooltip clarified to indicate this ability breaks existing Fear, Sap, and Incapacitate effects.
o Bladestorm: Now properly removes the Snare effect of Desecration in all cases.
o Blood Craze: Now properly triggered by periodic critical strikes.
o Execute: Focused Rage and the Dreadnaught Battlegear set bonus will now properly reduce the cost of Execute.
o Slam: The combat log tooltip will no longer list which rank of Slam was used. Previously it incorrectly listed rank 8 for all ranks of Slam.
o Vigilance: This talent and Blessing of Sanctuary will now both be able to be cast on the same target without sometimes overwriting each other.
* Items
o Adamantite Scope: Attaching this scope to an item will now cause it to become soulbound as intended.
o Badge of the Swarmguard: Will no longer cause a weapon swing animation when it triggers.
o Cenarion Set: No longer reduces the (nonexistent) cooldown on Hurricane. Instead, the set bonus increases the damage done by Hurricane by 15%.
o Commendation of Bravery: No longer useable when player is already at the maximum honor allowed.
o Deadly Gladiator’s Dreadplate: The set bonus will now trigger properly from Crippling Poison.
o Death Knight PvP Glove Bonus: The runic power gain no longer appears in the combat log.
o Death Knight Tier-7 Set: Fingers of the Damned now has a detailed combat log tooltip.
o Frostweave Net: Using this item no longer causes the user to break shapeshifts.
o Glyphs
+ Glyph of Beacon of Light: This glyph will no longer grant its duration increase twice when Beacon of Light is cast on self.
+ Glyph of Corpse Explosion: This glyph will no longer cause the model on target dummies to change.
+ Glyph of Death Strike: Tooltip typo corrected.
+ Glyph of Disease: Blood Plague will now last its correct full duration when refreshed by this glyph.
+ Glyph of Freezing Trap: The effect from this glyph will now log properly.
+ Glyph of Healing Wave: The heal from this glyph will no longer benefit twice from the Purification talent.
+ Glyph of Overpower: Fixed a bug where sometimes parries would not trigger the glyph. In addition, this glyph will now only make Overpower available for 6 seconds after a parry, instead of indefinitely.
+ Glyph of Power World: Shield: The heal from this glyph can now cause Divine Aegis.
+ Glyph of Shadow: This glyph can now be triggered by critical strikes from periodic damage.
+ Glyph of Shocking: Fixed tooltip error on Macintosh game client.
+ Glyph of Shadowflame: The effect from this glyph will now work properly when multiple Warlocks use Shadowflame on the target.
o Gnomish Mind Control Cap: Paladins who break the harmful effect from this item by using Divine Shield will now properly gain the Forbearance debuff.
o Goblin Dragon Gun: This item will no longer spam the combat log with cast messages.
o Heavy Netherweave Net: Using this item no longer causes the user to break shapeshifts.
o Major Arcane Protection Potion: Vendor price lowered to match other similar potions.
o Nightsong Battlegear: The 2-piece set bonus will no longer sometimes be triggered by other periodic damage other than those listed in the tooltip.
o Pandora’s Plea: Corrected a tooltip issue.
o Randomly generated uncommon (green) and rare (blue) quality items in Wrath of the Lich King had stat values that were lower than intended. All Wrath of the Lich King uncommon and rare items with random suffixes (“of the Bear”) have had their stat values increased significantly.
o Reins of the Icemaw Matriarch: This vehicle will now leave bear footprints instead of barefoot footprints.
o Reticulated Armor Webbing: Tooltip corrected to no longer claim that this item only works on plate items.
o Saronite Bomb: This item will no longer cause threat against nearby targets just outside the targeting circle.
o Scrolls: Scrolls which grant agility, intellect, spirit, strength, or stamina will now report an error message and no longer consume and waste the scroll when the target has a more powerful buff to that stat.
o Sif’s Remembrance: Sound and animation added to trinket effect.
o Sigil of Arthritic Binding: The bonus damage from this relic is now added after diseases have increased damage by a percentage, instead of after.
o Trinkets: Various trinkets which did not work properly with channeled area-of-effect spells will now work with those spells. This includes (but is not limited to) Illustration of the Dragon Soul, Darkmoon Card: Greatness, and Egg of Mortal Essence.
o Warrior PvP Glove Bonus: Tooltip reworded slightly.
o Wintergrasp Commendation: No longer useable when player is already at the maximum honor allowed.
* Professions
o Enchant Weapon – Black Magic: This enchantment can now be triggered by some spells it did not previously work with, including Curse of Agony, Blizzard, and Typhoon.
o Guardian Gloves: Now correctly marked as uncommon quality.
* Events
o Hallow's End: Putting out fires for this event will no longer trigger effects from items, talents, and set bonuses.
o Noblegarden: Loot windows will no longer periodically close while the looting player is transformed into a rabbit.