I dug up Buddy's key as the red prince and then talked to the dog, prompting him to dig up the key. I could then no longer talk to the dog, no talk icon would appear and no interaction with the dog was possible.
The priestess in the seeker camp would open up the conversation window and then quickly close it with nothing happening after a character was done discussing the main points with her and then trying to initiate conversation again.
Conversation with Needle: when asking about getting out of the fort, one dialogue option starts with "Say you there are".
Unless otherwise specified, just an opinion or simple curiosity.