Update: Rift 1.6.1 Hotfix 4

GENERAL

 * Wardstone turrets will no longer occasionally target certain NPC types with friendly fire!
 * Items: The armor debuff from Hawk's Talon no longer stacks with other short-duration armor debuffs.

Source
http://forums.riftgame.com/official-rift-news/patch-notes/287954-rift-1-6-1-hotfix-4-8-00am-pdt-12-22-11-na-2-00am-gmt-23-12-11-eu.html