Got a large game going and around 350 I started to notice a problem. I tend to do a manual save every 10 turns, and every second time I now lock up and have to kill the game.
I did not see the issue until I upgraded 1.09.
Debug.err: http://pastebin.com/EmBf6cKL
I have been getting the occasional crash all along, but this is the first one I can reproduce.
Let me know if I can provide more info.