The lower left room in the bandit camp has objects you can walk through, this might apply to other objects in the bandit camp as well.
When turning off simple mode from the benchmark, Kunnai teleports back to the very first room of the game. The room is on fire, the guy is knocked out, i have the option to leave, make the house mine, and talk to other NPC's there. Upon leaving, I can't return. It doesn't have the arrow above it at this point.
The female goblin scene in the upper left corner on the second floor of the replay gallery is unlocked despite never having acquired it.
There is a bone pile in the old cave ruins next to the locked gate that is surrounded and can't be interacted with. The picture in the topaz mines is similarly blocked off.
Walking on bridges in the bog cave hurts you.
One of the bandit buildings before the bog doesn't have collision next to the door.
The goblin that shows Kunnai her tattoo in the arena won't remove the image from the screen after challenging her. It does go away after selecting "done".