The mild glitches are completely random and weird. It's interesting, but it doesn't seem to affect anyone's real progress. I think most people fix their's by reloading. I had one minor glitch where a cut-scene wasn't as fast as the audio. But it wasn't too bad, because each phase of conversation waited for the previous phase of animation to end. So it's not like I heard the entire conversation and had to wait 10 minutes for the animation to catch up. It was just slow. Not a big deal. And haven't encountered anything else. Though from what I hear PS3 has the most glitches. Which sadly, is more common with multi-platform ports like this