My apologies if this has been reported before. Since this has happened on two different systems (both laptops, but one much better than the other) with two different copies of Civ 5, I thought it might be a bug. Sometimes, and I'm not sure when exactly or what causes it, a couple of improvements, cities, or resources get copied and are 'stuck to the screen', moving around with it as you scroll around, appearing always. Sometimes they disappear after a while, sometimes it requires a restart. It's hard to explain, so here is a screenshot: The city, the mine, and the pearls below them are not actually on those water tiles. They are just firmly stuck to that part of the screen and will always be there, no matter what area of the map I am viewing. Has this happened to anyone else?