I've tried making new games twice now, both were on veteran difficulty but I believe one was iron man and the other wasn't. Right after my first ground battle, I return to a black geoscape, with nothing on it besides my Chinook, base, and menu UI. The game will run for about 3 in game hours then crash.
I was going to upload a .zip of the game files, but it looks like the attach file link is down.
http://www.filehosting.org/file/details/419619/17.6_Save_Crash_after_ground_battle.zip