Well, there’s a relatively unusual event: the recent spate of random crashes with the game (all of them, I think) is actually down to the Java virtual machine crashing. After a bit of snooping, it transpires that the crash is caused by the experimental garbage collector I used in Java 6. So I’ve gone and reverted back to the very naughty Java 7 VM. Mac and Linux users are completely unaffected by this issue, so no worries on that front.
So, Windows users, you can download a fixed version of your games here:
Your saved games might break, I’m not sure. Try it and see.