I also had a problem with the dragonballs. I was in a game by myself playing around, I had them all gathered, and I put them in a line and ran through them scrolling my mousewheel (I was seeing if I could drop/pick them all up while running along) and the game froze and I had to alt-ctrl-del out.
Also. I was playing Riverside (i think thats what its called), and I can't find one of the dragonaballs at all, Its like its not there, unless its really well hidden? On my radar i should be right on it, it was kinda wierd.
Also something happned and I couldn't hear the players footsteps at all, I think it might have been after I pressed escape to change a control and went back into the game.
But its really fun, gj guys