[Original title: We don't go to Redcliffe any more. Changed, alas, to something actually descriptive.]
So, I'm trying to defend Redcliffe from the zombie horde coming out of the castle. Unfortunately, I've killed all of the zombies that I can see, and no more seem to be coming, but the NPCs seem to think that something still needs to happen. I can go up to the area where the green mist is, all the way to the castle gate, but I can't go through, and there aren't any obvious plot markers or triggers that I still need to hit. Is this a bug, or did I miss something?