From Guild Wars 2 Wiki
Update - 24 October 2012
- Added Mad King Chests to the Mystic Forge. These chests always have Halloween items such as candy corn, Halloween crafting materials, and Halloween tonics. There's a rare chance they may also have Halloween skins for weapons and shoulders.
- Added a Mystic Forge recipe to create Mad King Chests: 1 Piece of Candy Corn, 6 Mystery Tonics, 1 Boost (of any kind), and another Boost (of any kind).
- Tactician Footi will now properly build her cannon after being resurrected in Cursed Shore.
- Removed all hidden trick-or-treat bag nodes from Lion's Arch.
- Halloween-themed PVP items now salvage into the correct materials.
- Stealth skills now always apply the 'Revealed' buff when they hit their target (this update was not originally documented )
Guild Wars 2 Wiki notes
- The Special Events icon has been updated to party balloons with a purple background.