Since day one, when the game was released in September, I have been experiencing a glitch on the campaign map where all the land masses become submerged in water. This often happens when I switch between menus, or just move the camera around the map. This happens more frequently than a similar glitch that I often experience, where all land masses are blacked out. Cities, trees, agents, and armies remain visible. This eventually happens every time I play the game, and is quite annoying. It occurs without mods installed.