From Guild Wars Wiki
 Update - Friday March 23
- Made several changes to support the Chinese Open Beta Test.
- Updated pet tamer NPCs so that they can now remove pets from Heroes.
- Fixed a bug that allowed players to complete the Zaishen Priest Annihilation Training mission without killing the opposing team’s priest.
- Fixed a bug that prevented some players from completing the Chasing Zenmai quest.
 Guild Wars Wiki notes
- Currently Pet tamer can remove pets from any hero in an instance, whether you are the owner of the hero or not.
- This update or an earlier update changed Hahan, Faithful Protector's skills, making it possible for players with only Guild Wars Nightfall to capture Word of Healing without entering the Fissure of Woe.