Crashes game when you move "Friendly monsters" sound bar on survival multiplayer 13w42a EDIT: Also on other scroll bars

I was playing and then i was moving my sounds and when i moved the "friendly creatures" scroll bar at all it crashed my game. I reloaded minecraft and tried it again but it crashed again. I was playing on a survival multiplayer server at the time.EDIT: I played and it happens on other scroll bars as well seems to be random.