Windows 7, 64 Bit, Language: German
java version "1.7.0_09"
Java(TM) SE Runtime Environment (build 1.7.0_09-b05)
Java HotSpot(TM) 64-Bit Server VM (build 23.5-b02, mixed mode)
I started the game, played a bit on my single player map. I then went back to the main menu and minimized the game. It instantly crashed.