From the patch notes Nov. 10:
Auras will no longer cancel each other out when multiple people in a group use the same aura.
All I have to say is... WOOHOO!
Now while this affects all who have an aura, monks and zerkers are most likely to have more than one of that class in the same group which is why I posted it here. Very nice change, long overdue, but glad its here at last.