I tried the newer version, and now get an error even earlier in the game.

code dump
error loading mutex 0x80bf67d0 (3)

I played Monkey Island 3 on my Wii port of scummvm, and as soon as I destroy the boats with the cannon and attempt to return to the room the game ends and I get a few lines of code on screen. Any ideas on what I'm doing wrong, or what happened?