Installed the most recent update to the game and now it won't even start up. I'll get a couple of seconds of the initial load picture (The Last Supper bit), then the screen just goes black and after a little while, goes straight back to my home page on my console.
Tried restarting console, checked the disk for dust/smudges etc, tried inserting the disc to start etc etc. nothing will make the game start up at all now.