The old crap message:
Ace2 Has been blocked from an action only available to the Bliz UI
/cast [target=focus] Polymorph: Sheep
/s >>> Baa Baaa %f Sheep <<<
as a macro. Got thousands of addons and running Ace2 36539
Just noticed, It tried to use StopMacro() (not sure why it thinks ace is trying to use the macro itself.