From: John Joyce <dangerwillrobinsondanger@...>
Date: 2007-09-25T00:30:58+09:00
Subject: Re: "myscript.rb " - there's a blank in my name!

yes, OS X 10.4 and upcoming 10.5 all use Bash as the default shell.
You can of course change that to any of the others that ship with it.
Earlier versions used Tcsh as default, but shipped with Bash and a  
few others.