thanks for the link however i do have a :
~/.MacOSX/environment.plist having :
[...]
<key>PATH</key>
<string>/Users/yt/SVN/WebKit/WebKitTools/Scripts:/Users/yt/bin/ant/bin:/opt/local/bin:/opt/local/sbin:/usr/local/bin:/usr/local/sbin:/bin:/usr/bin:/sbin:/usr/sbin:/usr/X11R6/bin:/Users/yt/bin:/Developer/Tools:/System/Library/Frameworks/Python.framework/Versions/2.3/bin</string>
[...]
(bottom of given link)
in fact my "~/.MacOSX/environment.plist" is a translation of my zsh setup...
and i usually use shebang like that :
#! /usr/bin/env ruby -wx
(for all kind of shell)
nevertheless, ill try-out the .bash_profile given.
best,
Yvon