I just ran an epic Claw of Vulkoor on my rogue (had Heystack with me for the first fight) and i noticed two cases of very odd mob behavior.
Right after i stepped in and talked to the drow lady i got attacked by one of the two fire giant door guards.
He seems to have spotted me at the entrance from all the way back there.
The other giant was agroed too, but the barrier went up before he could make it to me too.
At the end of the quest, after opening the hidden door in the tomb, i got attacked immediately by the last guardian and the healing scorpion.
Usually they sit a good distance from that door, around a corner, so there is no way they could've seen me approach.
I did not have a pet or summon up at any time (i know they can agro mobs from a distance).
Did anyone notice similar things?
I sent in a bug report.