Hiya,
It's very hard to say, it could be something to do with your machine's setup (patches etc) or it could be a problem with the game data or simply a bug in ScummVM AGA itself.
You could try the same game with a 'clean' WB install in WinUAE and see if it falls over in the same place.
I take it this crash is repeatable?
I also had a bug with Broken Sword 2 which I could never get to the bottom of....
It does not always crash at the exact same point, however it happens pretty frequently. I have not been able to play it much.
I don't know if its related, but the sound seems to loop while loading form the HD.
I'll try it on UAE to see if it crashes, but should i try the 060 version like i'm using on my A1200?
I could also try an boot without my startup-sequence to see if its some crazy patch i'm running....
thanks.