When I open the game and I go to the world map or one of my towns' maps, the screen image starts shifting upwards (or towards north, if you will), and I can't control it. The other screens (hero, tech tree) seem to be stable. I distinctly remember this happening once before, but the problem went away once I quit and restarted the game. I tried that several times and the problem persists. It could be a little bug acquired with the last update, it happened right after it.Thanks for any help and suggestions.