I'm getting exactly the same error as others are getting in the Golden Cat and distillery (e.g http://www.gamesas.com/topic/1415661-game-crashing-to-desktop-golden-cat-mission/), but it happens to me in this Misison.

After discrediting the lord regent and trying to exit to the tower exterier i get the error and crash to desktop, every time, not matter what exit i use. I'm using an Nvidia card.

Has any solution to this issue been found yet?

Nearly a week, no response. That's some first class customer support there bethesda.....