Is it just me....

Or does anyone else have any issues loading a saved (single player) game? I created a map using the in-game map designer, and played many single player games.    Game will load, but within 5-30 minutes (variable time) or more, the game will suddenly crash to windows, and send a bug report.

I've not had any issues for the most part playing a game straight through as long as I don't quit/exit the game, but if I save it, and come back to it later it shuts down.

Comments?

Thanks.