As some of you may have already seen in your own raid groups, Paladins were able to capitalize on an unintended interaction between Seal of Righteousness, Seals of Command, and the Tiny Abomination in a Jar trinket after the Cataclysm Classic pre-patch launched.
This allowed Paladins to deal unfathomable amounts of damage, to the point where the number calculations would often freeze or crash the game.
While this isn't the only bug that the pre-patch launched with, the Seals of Command bug was quite literally game-breaking, both in terms of causing performance issues when triggered, as well as completely trivializing content (with some Paladins even going as far as being able to solo mobs in Icecrown Citadel). With the bug already fixed by Blizzard, we wanted to break down exactly how it functioned, and what the cause of it was.
The pre-patch changed certain Paladin talents, and one of them was Seals of Command, which was previously an active Seal players could use.
Instead, it now adds damage to existing seals when they trigger, such as Seal of Righteousness, where it turns the damage proc into an AoE damage proc.