From the start of playing through the beta's I've had the problem that everytime I try to save a game under a given name, the first time it adds a ~sign in front of it, and I have to manually delete that to be able to get a proper savegame. (wondering if anyone else has this problem?)
This time I started a new game in 1.0 insane map something like 67 AI opponents. And somewhere around turn 449 things are going wrong. I can't save a game myself without crashing, and the auto-save mechanism also crashes the game now.
PS did a complete reinstall, still the same problem
Also something I noticed, wondering if anybody else has the same problems: when deleting savegames ingame. And exiting, steam should normally delete these savegames as well. But it doesn't, and after a restart it automatically synchronizes again, and all my old savegames which I wanted to delete are back again. Including suddenly having two auto-saves and two previous auto-saved (i guess one is the campaign auto save I started but not sure) after reinstalling the game.