My guild was doing hard mode Assembly of Iron this evening, and the holy paladin that normally dispels the fusion punch debuff was out for the night, so I went disc to fill his place (along with the dispel duty). Every couple attempts, I was completely unable to dispel the debuff off the tank. I wish I had a combat log screenshot, but the log said something like.... "(My) dispel magic failed to dispel (tank)". So I know I'm not accidentally casting on the wrong target, and I know the spell is being cast, but the debuff is not being taken off.
This only occured after Molgeim died (we kill him first), dispels before then worked fine. We ended up having another paladin do the dispels to avoid this happening, but I'd like to know if any other priests have had this happen, or what I could be doing to cause it.
Thanks for any input.