I don't seem to be able to trigger the wards being released. I have the scroll from Venduris, but reading doesn't do anything, nor does walking to the edge of the screen and clicking on the area exits.
is there any way to force whatever is supposed to happen next to occur?
EDIT: I loaded aVenger's autosave and did the fight again, twice, just to be sure. This time the dialogue popped when I picked up the scroll. So...glitch, not a bug.