Update: Rift 1.6 Hotfix 4

GENERAL

 * Fixed an issue with Rifts not spawning properly during Zone Events in multiple zones.
 * Jingling Bells can now be opened inside of instances - but why would you want to wait that long!
 * Stonefield: The rare NPC Bahezerk no longer wanders into a nearby Guardian foothold.
 * Stonefield: Spawn of Centius corpses now require Mining to obtain materials from, instead of Butchering.
 * Stonefield: Unusual Results: Fixed an issue with the usable quest item sometimes not appearing in the quest stickies.
 * Removed Jorge Neralis' evil twin.

RISE OF THE PHOENIX [Sliver]

 * Beruhast: Inferno Lash now has a 1.2 second casting time.
 * Beruhast: Leaping Flame no longer requires line of sight when jumping from one character to another.
 * Some NPCs with increased resistance to Physical damage have been corrected.

DROWNED HALLS [Sliver]

 * Some NPCs with increased resistance to Physical damage have been corrected.

EMBER ISLE

 * Addressed an issue in the zone event, The Seed of Change, that could cause it to become incompletable.
 * A Treasure Beyond Measure: The pirate from the third quest step no longer respawns instantly.
 * Feline Intervention: Fixed an issue causing the quest item not to be granted if the character was also on Metallurgical Crisis.
 * Hunting Small Hunters: The Bloody Claw no longer drops after the quest has been completed.
 * Lurking in the Mist: Nearby Farclan Dwarves will no longer assist you against Ithkari Abominations.
 * Metallurgical Crisis: Fixed a bug with this quest not resetting properly.
 * Portentious Pods: The Greenwood Defenders should stick around longer once their pods are cracked open.
 * Recluse Wrangling: The Recluse mount should now stay firmly grounded. On the ground.
 * The Wanton Unbound: Addressed an issue that could cause this quest to become non-completable.
 * Achievement: Purging Pyrkari: More types of Pyrkari now count properly toward this achievement.
 * Corrected the loot drops from the rare spawn Osmas.
 * Sourcethief artifacts can now be sold to vendors.

Source
http://forums.riftgame.com/official-rift-news/patch-notes/283279-rift-1-6-hotfix-4-8-00am-pdt-12-1-11-na-2-00am-gmt-02-12-11-eu.html