I haven't encountered any of these yet, but I am seeing an issue with a torch in the crypt where a certain part of the lighted area has spots that flicker, almost as if the torch is no completely dispelling the darkness. A screenshot doesn't seem to do the effect justice because of the flickering, though.
Added a video
[video:youtube]
https://youtu.be/T0DBYuuhcg8[/video]