Druid
Ravage (All Ranks) - Damage changed from 350% to 385%

Hunter
Aspect of the Viper - Mana regeneration changed from 50% of the total intellect to 55%.

Mage
The mana gems min and max mana value have been modified slightly to get a less random bonus to the mana.
  Rank 1 - Restores 390 to 410 mana. (Instead of 375-425)
  Rank 2 - Restores 585 to 615 mana. (Instead of 550 to 650)
  Rank 3 - Restores 829 to 871 mana. (Instead of 775 to 925)
  Rank 4 - Restores 1073 to 1127 mana. (Instead of 1000 to 1200)
  Rank 5 - Restores 2340 to 2460 mana. (Instead of 1136 to 1364)

Rogue
Hemorrhage now deals 110% Weapon damage instead of 125%, bonus damage from the debuff is slightly increased.
  Rank 1 - 110% weapon damage, increases any Physical damage dealt to the target by up to 13.
  Rank 2 - 110% weapon damage, increases any Physical damage dealt to the target by up to 21.
  Rank 3 - 110% weapon damage, increases any Physical damage dealt to the target by up to 29.
  Rank 4 - 110% weapon damage, increases any Physical damage dealt to the target by up to 42.

Shaman
Water Shield
New Version - The caster is surrounded by 3 globes of water, granting 50 mana per 5 sec. When a spell, melee or ranged attack hits the caster, 200 mana is restored to the caster. This expends one water globe. Only one globe will activate every few seconds. Lasts 10 min. Only one Elemental Shield can be active on the Shaman at any one time.
Old Version - The caster is surrounded by 3 globes of water. When a spell, melee or ranged attack hits the caster, 200 mana is restored to the caster. This expends one water globe. Only one globe will activate every few seconds. When the spell expires, each remaining globe will activate and grant 200 mana to the caster. Lasts 1 min. Only one Elemental Shield can be active on the Shaman at any one time.

Improved Water Shield ([item=24413] effect) - Now gives 2 Mana / 5 sec along with the 27 mana bonus each time it triggers.
Lightning Shield (Rank 1) - Mana changed 45 from to 25
Lightning Shield (Rank 2) - Mana changed 80 from to 60
Lightning Shield (Rank 3) - Mana changed 125 from to 100
Lightning Shield (Rank 4) - Mana changed 180 from to 150
Lightning Shield (Rank 5) - Mana changed 240 from to 200
Lightning Shield (Rank 6) - Mana changed 305 from to 250
Lightning Shield (Rank 7) - Mana changed 370 from to 275
Lightning Shield (Rank 8 ) - Mana changed 430 from to 325
Lightning Shield (Rank 9) - Mana changed 490 from to 400
Earth Shield (Rank 1) - Mana Changed 600 from to 300
Earth Shield (Rank 2) - Mana Changed 745 from to 375
Earth Shield (Rank 3) - Mana Changed 900 from to 450

Professions
Transmute: Mithril to Truesilver cooldown has been lowered from 47 Hours to 23 Hours.

(2) - Added in 12/14 Update.
(1) - Added in 11/30 Update.

General

• (2) Boat and zeppelin vendors and NPCs are are back on duty.
  
• (2) Reduced network latency by disabling the Nagle algorithm.
  
• /timetest is a command that can be run to provide information on game performance. /timetest 0 turns the command off. When the command is issued, the next time a player uses a flight master to travel, certain statistics will be measured and displayed at the end of that flight. All weather effects and spawns are shutdown during the test.
• (1) Effects triggered from being critically hit: Many abilities and talents were changed in 2.3.0 to allow them to trigger from critical strikes that occurred while the player benefitting from them was sitting.
  
• Quest givers with blue question marks no longer show up on the minimap.
• NPC's who you have completed a quest for will display a question mark on mouseover rather than an exclamation point.
• The bank controls for the guildmaster level of a guild is now grayed out. A guildmaster always has full access to a guild bank and this cannot be changed.
• A "Withdraw-Repair Only" button has been added to the guild bank controls. If this is set for a guild rank, then that rank cannot actually withdraw funds from the guild bank, but they can still use that daily amount of money for repairs.
• You will now automatically stand up when attacked, even if the attack doesn’t land.

PvP

• (2) Warmasters/marshals in Alterac Valley now increase each other’s maximum health and damage by 20%. This is a stacking effect.
  
  

Druid

• (2) Ravage: The damage multiplier on this ability has been increased from 350% to 385%.
  
• (1) Lifebloom: When this ability is refreshed it will take on the strength of the incoming Lifebloom effect, rather than maintain the existing strength.
  
  

Hunter

• Arcane Shot: Ranks 1-5 will once again deal bonus damage based on attack power.
• Aspect of the Viper effect increased. (Details)
  
• Freezing Trap is no longer limited to one target at a time.
• Pet leveling speed has been increased.

Mage

• Cold Snap (Frost) cooldown reduced from 10 to 8 minutes. It is now in the Ice Block position in the talent tree. This ability will no longer reset the cooldown on Fire Ward.
• (1) Conjure Mana Gem mana restore variance substantially reduced,(Rank 5 – Emerald) now restores 2340 to 2460 mana and has three charges.
  
• Ice Block (Frost) is now available on the trainer to all mages at level 30.
• (1) Icy Veins (NEW Frost Talent) decreases casting time of all spells by 20% and increases the chance your chilling effects will freeze the target by 10%. Lasts 20 sec. 3 min cooldown. It is now in the Cold Snap position in the talent tree.
  
  

Paladin

• Crusader Strike (Retribution) now causes 110% of weapon damage and no longer gains any bonus from spell damage.
• Righteous Fury: This spell will no longer cost twice the listed mana to cast.
• Sanctified Judgements (Retribution) now returns 80% of the Seal's mana cost, increased from 50%.

Rogue

• (2) Ambush: The damage multiplier on this ability has been increased from 250% to 275%.
  
• (2) Hemorrhage: This ability now correctly does additional damage when its debuff has already been applied.
  
• (2) Preparation now resets the cooldown of Shadowstep and no longer resets the cooldown of Adrenaline Rush.
  
• (2) Shadowstep now adds a 3 second, 70% movement speed increase.
  
• (2) Sinister Calling now also increases the percentage damage bonus of Hemorrhage and Backstab by 2/4/6/8/10%.
  
• Cheat Death: When multiple attacks land simultaenously, all those resolved after the attack which triggered Cheat Death will now have their damage reduced by 90% as intended. However, the combat log will still report them doing full damage.
• Hemorrhage: Rank 4 of this ability no longer has its charges consumed by non-physical attacks and spells.
• (1) Hemorrhage weapon damage reduced from 125% to 110%, but the damage debuff has been increased.
  
  

Shaman

• Lightning Shield mana cost reduced.  (Details)
  
• Water Shield now restores mana periodically regardless of how many charges remain. Duration increased to 10 minutes.  (Details)
  
  

Warlock

• The health cost taken from the Warlock after using Health Funnel will now remain consistent between uses.

Warrior

• Defiance: The expertise granted by this talent now works properly in all stances.
• Warriors no longer lose rage when using a macro to enter a stance they’re already in.

Professions
Alchemy

• Transmute: Mithril to Truesilver cooldown has been lowered from 47 Hours to 23 Hours.

Cooking

• Goldthorn Tea was erroneously unlearned by most players who had learned the recipe. The recipe has been re-enabled and can be learned again from Henry Stern in Razorfen Downs at no cost.

Enchanting

• Enchant Shield - Resilience now requires a Runed Fel Iron Rod instead of a Runed Adamantite Rod.

Leatherworking

• Increased the range of leatherworking drums to 40 yards. Drums of Panic remains unchanged at 8 yards.

Items

• (2) The [item=34033] is now available on vendors. (Screenshot)
  
• (2) The [item=10720] duration has been increased from 10 sec to 20 sec.
  
• Amani Charm of the Witch Doctor: Tooltip typo corrected.
• Hearthstone: The cast time on this item is no longer affected by spell haste.
• (1) Hex Shrunken Head: This item now has a 20 second shared cooldown with other similar trinkets.
  
• Icy Chill Enchant: The triggered effect from this enchantment will now cause a melee slow and movement snare as intended.
• Idol of the Unseen Moon: This item now has a 30 second cooldown on being triggered.
• Idol of Terror: The triggered agility buff from this item no longer overwrites other agility buffs.
• The Netherscale Ammo Pouch is no longer a Unique item.
• The Knothide Quiver is no longer unique.

Dungeons and Raids
Heroic Coilfang Resevoir- Steamvaults

• Mekgineer Steamrigger's Main Chambers Access Panel is no longer interactable until Mekgineer Steamrigger has been killed.

Tempest Keep- The Eye

• The number of Blood Elves guarding Prince Kael'Thas' room has been reduced.

Zul’Aman

• The Amani'shi Warrior's Charge ability now has a minimum range.
• The melee haste provided by Halazzi's Frenzy has been reduced to 100%.
• Dragonhawks in Zul'Aman can now be skinned. This doesn't include dragonhawks that do not have loot.

Quests

• Blade's Edge Mountains: Players accepting the bombing run quests in Blade's Edge Plateaus will no longer cause other players in the region to stand up.

User Interface

• There is now an option to turn off the screen edge damage flash when you have a fullscreen UI up.
• You can sell stacks by dropping them on the merchant window again.
• Ready check (/readycheck) will now display a visual display of each party/raid member's status next to their name. This will display in the Party UI, the Raid UI and the Raid pullout UI. A player will get a check mark if they are ready, a question mark if they have not replied and a red X if they are not ready or are afk.
• You can now see raid members on the minimap as dark blue dots in addition to party members which still display as light blue dots.
• You can now shift click names while the petition window is open to paste them into the petition.
• Fixed various problems with /castsequence getting stuck.
• /cast will toggle spells again unless the name is prefixed with an exclamation mark, e.g. /castsequence Steady Shot, !Auto Shot

Bug Fixes

• (1) Characters may now possess up to five Paper Flying Machines in a single stack.
  
• Fixed “Spell/Ability is not ready yet” message when clicking quickly at the beginning of a cast.
• Fixed a server disconnect when moving the mouse over recipes in the guild bank.
• Gnomish Universal Remote will now work properly with the Fel Cannon.
• Disconnecting a USB HeadSet will no longer cause problems with the Voice Chat dropdown menus.
• Clockwork Rocket Bots will no longer attack each other in Shattrath City.
• Channel changes will now appear properly in the chat log after zoning in or out of instances.
• Unplugging headphones/speakers then plugging them back in while in WoW no longer disables all sound in WoW
• If the original owner of a custom channel gives leadership away their options menu will no longer show that they have moderation privileges.
• The first custom created guild ranking will now properly show up in the Guild Control pane drop down menu.
• Control-clicking on inventory items that teach recipes will now properly display you wearing the item made by the recipe in the dressing room UI.
• Fixed an issue that was not allowing all charges of a Field Repair Bot to be used.
• (1) Creatures with random player targeting crowd control abilities such as fear, charm, or sleep will now properly choose a random eligible target rather than just choosing the nearest eligible target.
  
• (1) The various Hallow’s End broom mounts now have their proper real-time (rather than game-time) duration of 14 days.
  
• (1) Tricky Treats now have their proper real-time (rather than game-time) duration of 24 hours.