Update: Hotfix 21

GENERAL GAMEPLAY

 * New and exciting Coin Lock restrictions!
 * If your character is Coin Locked, they may no longer: use public chat channels, yell, /tell, modify guild membership of themself or others, modify guild quests, MOTD, member notes, guild ranks, or train guild perks. On lockdown!

ASCENDED POWERS

 * Fixed a bug causing Ascended Powers to use up extra Planar Charges.

CULT SAGA

 * Marshal Kevdorras can now be reminded of his faith more easily.

RIFTS AND INVASIONS

 * Major zone events made to occur more regularly. For reals this time. Up to eleven.
 * Tools of Destruction: Improved the drop of Shadetouched Blades from Major Death Rifts.
 * Corrupt Essences should drop much more frequently for those with the Exorcising Evil quest.

COMBAT

 * Fixed a bug causing NPCs to be unable to attack stealthed targets.
 * NPCs will also be more responsive to switching targets when nearby opponents gain healing aggro.

ITEMS

 * Zone-wide loot drops in River of Souls now only come from the more powerful non-boss NPCs.
 * Genesis Pylon: The root effect from this item now breaks properly.
 * Battlemaster's Jerkin now with 100% more actual stats!
 * Several shields that were incorrectly set to be equippable by Clerics have been fixed; these included Bulwark of the Dragon, Arbiter's Defense, Prince's Crest, and Aegis of Souls.

CRAFTING

 * Updated Windstealing Rune references to Windshielding Rune. The recipe is now purchaseable from Quartermaster Ciaba with Storm Inquisiton notoriety.
 * Recipe: Exalted Bottle of Tricks now requires notoriety with the Arcane Hand, who sell the recipe.

Source
http://forums.riftgame.com/showthread.php?176494-Hotfix-21-NA-8-00am-PDT-4-27-11-EU-2-00am-BST-27-4-11