This bug erroneously places some buildings on the wrong terrain. For example, I can put a great mill on forest terrain. It doesn't actually place, but I am also limited from placing it anywhere else.
Reproduction steps:
1) Place a building where it belongs, for example a merchant.
2) Select another building in the building list. Click the building in the list again to de-select it.
3) Select a 4-tile building
Result: The final 4-tile building appears above forest terrain instead of normal terrain. http://i.imgur.com/5z9wt.jpg
Note: the steps must all follow each other. If you don't you won't see the bug.
