The fix for 6787605 took care of getting ShellScaffold.sh working on
OpenSolaris releases. I neglected to test to see if the fix would
work on Solaris 10 update releases. It fails there because /usr/bin/id
does not support the "-u" flag:

This is on a s10x system recently upgraded to the latest S10 update release:

% cat /etc/release
                       Solaris 10 10/09 s10x_u8wos_08a X86
           Copyright 2009 Sun Microsystems, Inc. All Rights Reserved.
                        Use is subject to license terms.
                           Assembled 16 September 2009


% UU=`/usr/bin/id -un`
/usr/bin/id: illegal option -- u
Usage: id [-ap] [user]


From 'man id' over on an OpenSolaris 2009.06 install:

     -u Outputs only the effective user ID, using the format
           "%u\n".