This is another important talent in the tanking-category, based on lowering the opponents attack instead of increasing the Paladin's defense. Given its useful effect and that it only requires 1 talent point, it is a must for all serious tankadins.
Patch 4.0.6 (2011-02-08): No longer allows [Hammer of Justice] to interrupt stun-immune targets. With [Rebuke] baseline, this functionality is no longer necessary.
Patch 4.0.1 (2010-10-12): Again, redesigned. Now lowers the physical damage done by the target, instead of attack power. Also moved from Retribution to Protection, from Tier 3 to Tier 5, and reduced from 2 ranks to 1. Has increased in duration from 10 to 30 sec, and is now percent-based instead of fixed number-based.
Patch 3.2.0 (2009-08-04): Redesigned. Now lowers target attack power, is consistent, and does not stack with [Demoralizing Shout].