This time without any hacking. To be safe, I saved outside the mines. No errors, but still passing through wall to north side of doorway and in the next room west, clicking on next doorway, Roehm does a 360 turn before continuing. And a random occurrence in the beast screen, the beast doesn't show up and the game freezes. No error messages on these two things, so that's something I can live with now that it's a completely random thing.