I have problems most of the time when I try to minimize the game to the task bar, most of the time it doesn't minimize, and the only way to get out of it is to quit completelly the game.
This is really annoying as I host but I also have some other things to do on the computer as well, while the other guys are playing on my server/room.
Also the clouds seem to have very sharp and straight edges when u are high up entering in them.