Maybe it was reported already, and maybe its in the beast tamer discussion thread, but there's too many pages to scroll through. I just think its better to just stick it here for everyone to know. What this means is if you have any ignore pdr buffs, it will override it. For Dks, this means goodbye sacrifice, for others, it just means your ignore pdr effect is overwritten. Coincidentally, this also applies to those potions from gollux and RA shop, they get overwritten if you cast a conflicting buff with it. Everything else seems to stack fine though, except for the exp boost, which HS will override.