Basically Blizzard's only attraction at the moment in most peoples eyes, World of Warcraft, has had a new patch update for both the european and amercian versions.

Its a rather big update so I'll only give you the Bug Fixes, you can read the rest on the link below:

Bug Fixes

• Group loot has been fixed to work as originally intended. It will now work exactly like round robin does, with the exception that when an item of threshold level or above drops, it will use the auto-rolling system. (Prior to this fix, when in group loot mode, the round robin system was only being used for items (all players could loot coins), which was rather confusing).
• Fixed a group loot permission bug that was telling players they did not have permission to loot.
• Fixed a bug that was causing the game to freeze when scrolling through auctions in the Auction House.
• Murlocs play the drown animation when they die underwater now.
• Onyxia correctly hovers instead of standing in midair.
• You can target vocal emotes again.
• Pets and summoned creatures attacking enemies will now tap the enemies for their owners.
• Fixed a bug with Troll Shamans and the Berserk ability. Troll Shamans can only go Berserk when they are in the wounded state.
• Rogues now correctly gain Lockpicking skill from items picked in the trade window.
• Quests that require you to follow/escort an NPC will only complete when you arrive at the designated area.
• Horde and Alliance members cannot duel with each other regardless of realm type.
• Herbs and mineral nodes will remain active if they are not fully emptied.
• Fixed a bug that was giving higher damage-per-second (DPS) to Steelarrow Crossbow and Blackcrow than was intended.
• Sell prices on Hypnotic Blade, Illusionary Rod, Mantle of Doan, and Robe of Doan have been lowered.
• Players who have completed the quest to summon Kirtonos may now obtain the Blood of Innocents from Doctor Theolen Krastinov.

For the full readme on the updates/fixed head over to this page.