Here is the info straight from battle.net:
Here you’ll find a list of hotfixes that address various issues related to the recently released World of Warcraft patch 5.4: Siege of Orgrimmar. Hotfixes are updates we make on our end without requiring you to download a new patch. Some of the hotfixes below take effect the moment they were implemented, while others may require your realm to be restarted to go into effect. Please keep in mind that some issues cannot be addressed without a client-side patch update. We will continue to update this list as additional hotfixes are applied.
Hotfixes: Listed By Date
October 23
Classes
Death Knight
General
Reduced Death Strike’s healing by 50% for Blood Death Knights in Arenas.
Raids, Dungeons, and Scenarios
Siege of Orgrimmar
Garrosh Hellscream
[Requires a realm restart.] Kor’kron Reapers now deal less damage on Raid Finder difficulty.
[Requires a realm restart.] Minion of Y’Shaarj’s Empowering Corruption now heals for 15% of health (down from 30%) and increases damage dealt by 20% (down from 50%) on Raid Finder difficulty.
[Requires a realm restart.] Harbinger of Y’Shaarj’s Y’Shaarj Touched now heals for 2% of health per second (down from 5%) and increases damage dealt by 20% (down from 50%) on Raid Finder difficulty.
October 22
Classes
Mage
Class Armor
Tier-15 4-piece set bonus now increases the effects of Arcane Charges by 5% per stack (down from 20% per stack).
Monk
General
Tigereye Brew and Mana Tea gains from Chi Brew now correctly benefit from Mastery: Bottled Fury and Brewing: Mana Tea.
Warlock
General
Damage from Soul Link should no longer incorrectly activate the Voidlord’s Void Shield effect.
Raids, Dungeons, and Scenarios
The number of guild members needed to be considered a guild Group in Flexible difficulty has been reduced. Previously, the number of guild members required in Flexible difficulty didn’t account for the scaling group size. It now requires 80% of the current group size, rounded down.
Siege of Orgrimmar
Garrosh Hellscream
Hellscream’s Warsong now grants a 75% increase to Physical damage dealt and health (down from 125%) on Raid Finder difficulty.
Touch of Y’Shaarj now has a 4-second cast time for players (up from 3 seconds) on Raid Finder difficulty.
Reduced the health of Minions of Y’shaarj on Raid Finder difficulty.
Battlegrounds and Arenas
Arenas
Players who pick up a Shadow Sight orb will be unable to stealth for the duration of the effect.
October 21
Classes
Druid
Talents
The Dream of Cenarius effect is now removed when the Druid switches talents.
Raids, Dungeons, and Scenarios
Siege of Orgrimmar
Norushen
The number of Look Within orbs spawned by Norushen in Flexible difficulty will now round up instead of down, so that the ratio of orbs to players is never worse than on Normal difficulty.
Galakras
The portal leading back to the Vault of Y’Shaarj can no longer be used while in combat.
Battlegrounds and Arenas
Arenas
[Requires a realm restart.] The Crowd Chose You has been removed and replaced with a debuff called Dampening.
[Requires a realm restart.] For Arena matches that last more than 10 minutes, all players in the Arena will begin to receive Dampening.
Dampening is a stacking debuff applied to all players in the Arena every 10 seconds.
Each stack of Dampening reduces all healing and damage absorption by 1%.
If neither team has won after 20 minutes, the Arena match will end in a draw.
Necrotic Strike’s healing absorption is not affected by Dampening.
Items
Protection Paladins are now eligible to receive the following items with via personal loot (Raid Finder and Flexible difficulty) and bonus rolls (all difficulty modes).
Siege of Orgrimmar: Bubble-Burst Bracers, Corruption-Rotted Gauntlets, Darkfallen Shoulderplates, Demolisher’s Reinforced Belt, Legplates of Unthinking Strife, Poisonbinder Girth, and Thranok’s Shattering Helm.
Ordos: Magdalena’s Murderous Crown, Partik’s Purified Legplates, Remnar’s Ruinous Girdle, Rossi’s Rosin-Soaked Shoulderplates, and Vanguard’s Burly Bracers.
October 16
Classes
Mage
Class Armor
Resolved an issue that could cause the Tier-16 2-piece set bonus Frozen Thoughts to be consumed without effect.
Priest
Holy
Mastery: Echo of Light’s healing has been increased by 4%.
Warlock
Talents
Archimonde’s Darkness’ effect should now be correctly removed when the Warlock switches talents or glyphs.
Quests
Timeless Treasures: Weekly treasure chests on the Timeless Isle can now grant credit towards completing this quest.
Raids, Dungeons, and Scenarios
Siege of Orgrimmar
Galakras
Reduced the health of ranking officials and foot soldiers in Phase 1 of the encounter on 10-player Normal difficulty.
Kor’kron Dark Shaman
Ashen Wall, Toxic Storm, Toxic Mist, Foul Stream, and Foul Geyser now deal less damage on Raid Finder difficulty.
Spoils of Pandaria
Reduced the health of most of the creatures during the Spoils of Pandaria encounter on Raid Finder difficulty.
Having multiple players start the encounter should no longer incorrectly cause the timer to count down rapidly.
Thok the Bloodthirsty
Captive Cave Bats on Raid Finder difficulty will no longer incorrectly drop Normal difficulty loot.
Garrosh Hellscream
Garrosh Hellscream should now use his abilities more predictably when starting Stage Three: MY WORLD.
Mogu’shan Vaults
Resolved an issue that prevented players from completing the Straight Six achievement.
Battlegrounds and Arenas
[Requires a realm restart.] Silvershard Mines: The eastern mine cart now doesn’t spawn in until shortly after the gates open.
Professions
Cooking
Noodle cart chefs will now receive a well-fed buff while serving other players bowls of noodle soup.
Items
Nazgrim’s Burnished Insignia’s should no longer be incorrectly activating from actions that aren’t helpful spells.
Ticking Ebon Detonator’s should no longer be incorrectly activating from actions that aren’t attacks.
October 9
Classes
Druid
Restoration
To help address issues with input lag, Efflorescence now heals for twice as much every 2 seconds (was once every 1 second). Additional adjustments have been made so the total amount healed by Efflorescence from Swiftmend, Force of Nature Treants, and Wild Mushroom remains unchanged.
Warrior
Talents
Corrected an issue that allowed Warriors to cast Storm Bolt while under the effects of a Hex.
Creatures
[Requires a realm restart] Engaging Ordos in combat will no longer cause the Ordon Sanctuary gate to close.
Added an upper limit to the number of wolves that could be summoned by Moonfang’s Call the Pack ability.
Flik and Flik’s Frog should no longer incorrectly wind up under the terrain on Darkmoon Island.
Raids, Dungeons, and Scenarios
Siege of Orgrimmar
Norushen
Resolved an issue that could cause the Overconfidence debuff to persist after defeating Zeal.
Kor’kron Dark Shaman
Reduced the amount of hostile NPCs in the areas leading up to the Dark Shaman encounter on Raid Finder difficulty.
General Nazgrim
Reduced the amount of hostile NPCs in the areas leading up to General Nazgrim on Raid Finder difficulty.
Spoils of Pandaria
Blade of the Hundred Steps should now only be applied to one tank per quadrant in Normal and Heroic difficulties.
October 7
Classes
Priest
Holy
To help address issues with input lag, Mastery: Echo of Light now heals for three times as much every 3 seconds (was once every 1 second). Total amount healed remains unchanged.
Shadow
To help address issues with input lag, Vampiric Embrace now heals every second instead of every time the Priest deals Shadow spell damage. The total amount healed remains unchanged.
Class Armor
Corrected an issue where the Tier-16 Shadow 4-piece set bonus was improperly applying the damage bonus to additional spells when multiple instant cast spells are cast at the same time.
Rogue
Talents
Corrected an issue with Cloak and Dagger that could allow Rogues to bypass some targeting and line-of-sight restrictions.
Creatures
Evermaw’s spawn is no longer tied to Dread Ship Vazuvius.
Moonfang should now always drop something when defeated.
Raids, Dungeons, and Scenarios
Siege of Orgrimmar
Spoils of Pandaria
Corrected an issue where Spark of Life had more health than intended on Flexible difficulty.
Garrosh Hellscream
Garrosh Hellscream should no longer use Malice against players who have an Iron Star fixated on them on Heroic difficulty.
October 4
Classes
Death Knight
General
Resolved a visual issue caused by Death Knights using a Glyphed version of Horn of Winter while transformed by the Rime of the Time-Lost Mariner.
Druid
Class Armor
Resolved certain situations that could cause the Tier-16 Guardian 4-piece heal-over-time effect to heal for less than intended.
Shaman
General
To help address issues with input lag, Stormlash Totem’s Stormlash effect now has a 20% chance to activate but deals 5 times more damage (down from a 100% chance to activate). Overall damage output should remain unchanged.
Warlock
Affliction
Haunt should no longer incorrectly increase the damage of non-periodic spells.
Warrior
General
Resolved an issue with Whirlwind where polearms equipped in the off-hand slot were not hitting enemies.
Raids, Dungeons, and Scenarios
Siege of Orgrimmar
Malkorok
Resolved an issue where Malkorok may sometimes fail to respawn after a soft reset of the raid instance on Heroic difficulty.
Thok the Bloodthirsty
Creatures leading up to the encounter with Thok the Bloodthirsty are now skinnable.
October 3
Timeless Isle
Resolved an issue that could cause some weekly treasure chests on the Timeless Isle to be uninteractible.
Classes
Death Knight
General
Death and Decay, Howling Blast, and Pestilence should no longer incorrectly grant a radius bonus when cast while the Death Knight is moving.
Class Armor
Tier-16 DPS 2-piece set effect should no longer incorrectly cause stacks of the buff to provide no bonus under certain conditions.
Druid
General
Casting Healing Touch should no longer incorrectly consume both bonuses from Soul of the Forest and Sage Mender (Tier-16 Restoration 2-piece set bonus) at the same time.
Monk
Class Armor
Mistweaver PvP 2-piece set bonus should no longer cause the Monk to stand up when they gain a charge of Mana Tea.
Paladin
Holy
Holy Radiance should correctly benefit from Holy Avenger once more.
Class Armor
Corrected an issue where Divine Purpose and the Tier-16 Retribution 4-piece bonus was not interacting properly with each other.
Warlock
General
Grimoire of Sacrifice should no longer incorrectly reduce spell damage while Fire and Brimstone is also active.
Quests
The Celestial Tournament: Players can now get credit for winning the tournament while in a raid group.
Creatures
Players should no longer be incorrectly flagged as having defeated Ordos for the week if the player tapped him and went offline or entered an instance.
Yu’lon now launches 5 Jadefire Bolts (down from 10).
Gulp Frogs are now immune to mind control abilities.
Magnataurs can no longer be pickpocketed.
Dame Evniki Kapsalis is now offering her wares to players that meet the proper criteria once again.
Raids, Dungeons, and Scenarios
Siege of Orgrimmar
Sha of Pride
Resolved an issue that could cause Corrupted Prisons to stop functioning.
Resolved an issue that could cause Unstable Corruption rifts to stop forming on 25-player Heroic difficulty.
Kor’kron Dark Shaman
Wavebinder Kardris should no longer target non-players with Toxic Storm.
Darkfang and Bloodclaw should now move around significantly less while being tanked alongside their masters.
Resolved an issue that could cause Blind Blademasters in the Drag to enter combat with players during the Dark Shaman encounter.
Spoils of Pandaria
Modified Anima Golem’s Matter Scramble should now always spawn on the floor.
Resolved an issue that would sometimes cause a Burial Urn’s Spark of Life to path to the wrong area.
Resolved a situation that could cause the encounter to not reset correctly if the player starting the encounter dies immediately.
Siegecrafter Blackfuse
Demonic Circles are now cleared when the encounter starts.
Paragons of the Klaxxi
Resolved certain situations that could cause players to retain the Paragons’ abilities after resetting the encounter.
Resolved an issue where the last surviving raid member using a threat drop may cause the encounter to not reset correctly.
Garrosh Hellscream
Garrosh Hellscream now drops two Kor’kron Juggernauts on 25-player Heroic difficulty. (Requires realm restarts to take effect.)
Dungeons
Shado-Pan Monastery: Defeating Gu Cloudstrike immediately after Azure Serpent has been killed should no longer prevent players from continuing through the Shado-Pan Monastery.
Battlegrounds and Arenas
Grievous Gladiator weapons have a level requirement of 90 once more.
PvP on-use trinket effects should no longer incorrectly scale down while in a Battleground, Rated Battleground, or Arena.
Items
Trinkets with cleave and multistrike effects no longer require players to be facing the target to successfully deal damage.