You might also read Situation 6 on this years Fed Softball Rule Interpertations.
http://www.nfhs.org/sports/softball interp.htm
The batter "bunts the ball over foul territory to the left of home plate. The Ball is below the batter's head when F2 lunges to her left and catches the ball. Ruling: Legal catch; batter is out. . . . "
Over the head means it can't be a foul tip, but below the head doesn't mean it can't be caught for an out!.
Roger Greene