I've noticed that -- at least while doing the quest to find the teleporter to the Strange Temple and after completing the quest -- I cannot open my inventory (or look at any character info screen) while I am in the Pit or the game freezes up with an internal error (it says "internal error" on a special pop-behind window), and I have to exit the game from the task manager. I've tried getting to the Pit several ways and the same thing happens -- but ONLY in the Pit. I haven't tested yet to see if I can go to the Pit and back out and everything will be fine.

Maximus gave me the quest completion; I tried to look at my XP and BAM - game froze.

So I tried from an earlier save - I TP'd out to the Pit from the Strange Temple and same thing (it's not tied to the quest completion). I had an earlier save but that had the same problem when I went to the Pit, so if it doesn't correct itself when I leave that area, the mod is completely hosed for me.