The main changes are that room 11 is gone -- it didn't do anything interesting -- and I've stacked a couple of rooms on top of others -- 9 is above 8 and 14 is above 12 -- so that the castle has actual towers now. Oh, and the castle is now built on rock spires -- crags, if you will -- above a pool of lava, because castles nestled atop lava pits are cool. Or, er, hot.
As such the almost-fatal rock trap at 2 is now an almost-fatal lava pit trap, and it did indeed claim the life of one of the player-characters as he ran across the false floor in a barbarian rage, only to plop into the bubbling hot stuff.
I've hinted at the edges of the crater but not defined them, because I ran out of space; I'd say that they are about three or four squares away from the tower walls, far enough away that jumping is impossible but close enough that clever plans could find a way across.
Feel free to use as you see fit, or indeed not. I have a couple of other maps from the campaign to upload so look out for them in the next couple of weeks.