1.0 bugs
1) The AI actually cast a strategic spell on my stack, which was awesome. However it didn't seem to expire; the spell was Wither, which I believe should last three turns. It lasted until the end of the game. Which was only a dozen turns or so, I was losing badly, but it was certainly a lot more than 3 turns. The icon was definitely still on my stack, although I didn't double-check that it was affecting the stats. If it;s relevant to anything I had lost both my cities at the time!
2) Not sure if this is a bug or not; I was unable to Declare War on the AI. I had recently paid tribute to the AI to stop him attacking me. Does this stop the AI declaring war for a certain period? If so I assume this should be one-way, i.e. it should still be possible for the player who paid the tribute to declare war on the player they paid the tribute to. Otherwise how can we build up sneak attacks on our oppressors?