First, when In the crawlspace in the room with the "Kitty" in zone Deliverance 2 and the knight is looking for you, when he opens the cabinet next to the crawl space, you are magically teleported into the cabinet. I've also noticed that guards can look under one end of a long table and find you while you were at the other.

Another minor bug in the game is in the Embassy when creating a distraction so you and the ambassador can escape, I've seen a guard in the hall with the chandelier trigger bend to look into a wall grate only to slide down the hall and look in another. I don't mean that he stood and walked over, he bent at one and stood back up at the other.