Hehe well lets make some bug-predictions then for the citys. ^^ its a tradition in here before the feature releases anyway.
- Every citizen will try to live in the same house. All other houses are empty.
- Wild animals will be spawned inside of homes.
- Tame animals such as yaks, dogs, and mysteriously enough, a lungfish will own houses and be treated as full civ members.
- A building type that was supported in the previous history of a town (such as a shop) before a mass die-off will be built in the middle of farmland because it was never subsequently removed.
- Houses will not respect the topography of the land they are built upon - they will be built several z-levels above the roads they supposedly connect to if they are built upon a slope.
- Failing that, and houses are forced to be on the same z-level as a road, houses built over the other end of the slope will hover in mid-air to be able to connect to the road.
- Cities will be built partially over tundra or glaciers that are Freezing, and citizens will die of the cold if they are spawned in those portions of the city that are in those biomes.
- The streams in the middle of the city will have hippos and alligators that are constantly aggravated into attacking citizens who come by for water, leading to a single legendary hippo killing half the populace some time you weren't looking, including the guys you were doing quests for.
- You are considered "trespassing" and hence, the entire population will hunt you down to kill you, if you accidentally enter any building that is not a shop. There will be no outward sign which buildings are shops or not.
- Empty houses still have limitless food barrels, and you can take the property of potentially thousands of unclaimed homes (technically not stealing), and sell them for functionally infinite money.
... I'm having trouble coming up with more, but I think these should be fairly representative.