I just entered Vulova Estate. I thought everyone turned hostile after I left Vulova go the first time through.
This time Laen Torg is still blue and I can talk to him he says Vulova does not want to talk to anyone get out.
Also Vulova's Wizard is the corner and not hostile
If this is correct then I must have done something wrong the first time cause I know I had to clear it out.

Edit
I think this is what the problem is cause the same happened when I finally reached Leina. If you don't advance into the room all the rest don't turn hostile. After I met Govan one of his buddies turned yellow and ran upstairs on exiting he was hostile and then everyone else left in the room went hostile. So I finished them off.

He was really afraid of your appearance... he didn't sign the death contract.