I'm hearing NPCs yawn, cough.
That's not new - I've heard it from when I started (1.2) and still do (1.4). It's possible, however, that your game was acting buggy and the NPCs only started doing that after 1.6.

I had a guard that I did the vampire feeding on with the charm bit. Every time he passes me(or at least I think it is the same one), he says: "Wait I know you".
That means you have a bounty.
