Playing a small map with 2 major races. Last turn I used the Benevolent ideology ability to take possession of all starbases and planets in my ZoC which allowed me to capture the 2 minor races. Next turn I rearranged shipyard sponsors, adjusted my new planets a little, etc. When I hit next turn the game exited to the desktop without errors. I happen to have saved my game right after I messed with the planets and stuff if any devs want to look at it...