Also there's something in eglandaer's room, I was there before meeting him (crushing the door to steal some things) and when he returns to that room my characters are stuck outside.
Even though there's no door anymore ('cause I destroyed it) I cannot pass and go to him.
The same thing happened to me in the lighthouse. As far as I can tell the debris of a destroyed door can block your path, but only if you first go to a different area and come back later. I tried it with the door in the warehouse and it happened:
Obviously a pretty serious bug.
I'm also finding that (quick)loading can mess with NPC patrol routines. Specifically, they often just seem to stop moving at all. That's how I was able to destroy the door in the warehouse without the guards noticing. Clearly this is highly exploitable, as you can quicksave at the right moment to make stealing even easier.
Finally, here's a screenshot of my two main characters after they were teleported to the Character Creation screen when they exited the Black Cove.
This is reproducible and I'm surprised I'm the only one to report it so far. That's not supposed to happen, is it? Note how it's night, by the way.