Undo bug found

[Z <z@xxxxxxx>]

Not sure if this has been reported yet, but I noticed that the undo feature 
doesn't undo building ownership.

In any map with a neutral building, position your infantry where you can 
enter the building during the next turn. In the next turn, enter the 
building, then undo the move. The building is still owned by you, but you 
are free to move your infantry somewhere else on the map.

It's not a huge deal, but does present you with an added and unfair (albeit 
slight) advantage.