A bug that apparantly was on PTR and is likely related to Naxx, is still present in the live 1.11:
I was MT'ing in Strath, and Nerub'enkhan launches about 15 little "Crypt Scarabs" that each hit for 40-120dmg every second or so. I went from 5k+ to 0 faster than grabbing aggro from Ragnaros.
