I do not know how to describe the error. When the game starts it's all OK, but during the game, the picture freezes, and all the ships disappear from the map. Then my ship goes from the screen. Thus, visual view remains frozen, in one place, but the ship fly away. I can stop the game and return to the port, but if I choose another ship and start a game, every thing is empty. The only solution is to get out of the game and re-start. But still happens the same problem. I downloaded the latest drivers for video card, but this error is constantly present as well. This error began to occur after upgrading games 0.5.4.0.