I have the latest patch 1.2
Now I'm on the quest efter Geralts dream vision of the dead assasin. I should find the assassins hideout. But the quest markers has shown me two different places and there is nothing at both of them. Were is the hideout?

Also, how come its faster to roll than run? I just roll where ever I go. looks kind of funny

Hi there! I had the exact same problem. And it happened to me before the patch so I'm assuming it didn't get fixed.
My solution was to bring the map up while I was in the dream, in order to see exactly where the hideout is. After that I just ignored the markers(which were even jumping around the map) and I went straight there. So you can do the dream sequence again and see where you go.
Hope it helps!

Edit: I found a map on the wiki to the assassin's hideout.