Bornakk has listed the patch 3.3 hotfixes on the official forums, and there's a bunch. Onyxia is killable once again, the Halls of Reflection disconnect problem has been resolved, and the inventory issue has been fixed.

Blizzard implemented a total of 16 hotfixes, and you can read them all after the jump.

• Onyxia has settled down and is once again killable and flying in the proper areas during phase 2.
• Icetouched Earthragers casting Avalanche now deals appropriate damage.
• The quest “Keeping the Enemy at Bay” is now completable.
• Totems are no longer targeted by chain effects as intended.
• The Death Knight chest piece, Scourgelord Chestguard, has been updated to reflect appropriate tanking statistics.
• Emblem of Triumph quartermasters now exchanges one Emblem of Conquest for one Emblem of Triumph.
• The NPC Usuri Brightcoin in Dalaran now exchanges one Emblem of Triumph for one Emblem of Frost.
• Bosses no longer respawn in the new Frozen Halls 5 player dungeon after being defeated.
• Scourgelord Tyrannus now heals to full when the encounter begins.
• The chance for epic items to drop off trash mobs in the Icecrown Citadel raid dungeons has been reduced.
• The chance for epic items to drop off trash mobs in the Frozen Halls 5 player dungeons has been reduced.
• Running up the ramp at the end of the 3rd encounter in Halls of Reflection will no longer disconnect players. http://forums.worldofwarcraft.com/thread.html?topicId=21723843673&sid=1
• Trading soulbound items will no longer make them appear as lost. http://forums.worldofwarcraft.com/thread.html?topicId=21723842445&sid=1
• Improved Counterspell now triggers Burning Determination as intended.
• The Call to Arms: Warsong Gulch daily quest is now properly offered to players of all levels.
• The quest “No Mercy for the Merciless” can now be completed as intended.