Hey Draca,

Angryface Halloween pet has a broken stonewal. Reads as:
"Slot 8: Increase Melee Mitigation by 15%"
 Effect does not show up in stats, and I've checked the mitigation and it doesn't work.
 
Similarly, Insane Goblin reads (and we all know works):
"Slot 5: Decrease Melee Mitigation by -17%"

Pretty sure ranger epic effect (random) from the bow doesn't work for the same reason.