From: Boston, Mass
I've run into two conditions, one I think is clearly a bug, while the other makes me wonder.
1. I've seen the AI build ships in land locked cities. I may have a screen shot of this somewhere.if so I'll post it. v211-v214 I think
2. On a standard, random, crates/AI game, an isolated, island, renegade AI city, was pounded by my air and naval forces to near 0 points, but always had full points and production at the next turn, preventing any sort of reasonable invasion. V211 I think