It seems Austria's "Diplomatic Marriage" may hang Civ 5. In my current game, I was able to use this ability until a certain point, but several turns later it hanged Civ 5. In this game there's only 1 civ left, and I'm filling the map with new cities to maximize the score. Maybe the hung is related to the number of cities I have?.
EDIT: Removed the savegame because the bug is now fixed.
Moderator Action: Moved to bug reports.
EDIT: Removed the savegame because the bug is now fixed.
Moderator Action: Moved to bug reports.