I think this may actually be a bug in my game but I want to make sure that I'm not missing something.
I have finished the Hatred Symbolized quest in Chapter 2 of The Witcher 2 following Roche's path. I am in the Catacombs where I meet Saskia and Zoltan. Saskia gives me the sword I need to complete the quest. There is a locked door behind them that I should be able to access at this point.
I looted the corpse in the main room and received a catacomb key. I have tried the door after acquiring this key and it still says it's locked. Should this key unlock that door or is there another key that I missed along the way? If so, what is the catacomb key actually for?