Update - Friday February 16

Fixed a bug that caused item icons to appear blurry on some systems.
Fixed a bug that allowed some players to skip a portion of the "Chasing Zenmai" quest.
Fixed a bug that caused chests to spawn less frequently in the Domain of Anguish.
Fixed a bug that prevented some players from entering the Rollerbeetle Racing arena.
Re-enabled sound for miniatures, but only while in an explorable area or mission.
Modified several Hero items that incorrectly allowed upgrades to be applied.
http://www.guildwars.com/support/gameupdates/updatearchive-2007-02.php