Not sure if this has come up yet but after creating the mercurian gate and switching to the Mercurians, the game locks up with a message appearing "Waiting for players"
Single player game, done on standard map, normal speed, nothing special playing as the Bannor.
Also, not sure if this is intended or not but on the same game, while sieging Coombe View it swapped (looked almost like a culture swap) to the barbarian state, with a lone barbarian freak to defend it. This happened as well on the turn the game locked up on another of their cities. They were Ashen Veil at the time.