[BProc] shell_hack and permissions on /proc/self/fd/3

[Samuelson, Frank* <FW...@CD...>]

I have a problem when trying to run a #!/usr/bin... scripts
via bpsh on clustermatic 5:
/proc/self/fd/3: Permission denied

Last month someone else had a similar problem:
http://sourceforge.net/mailarchive/forum.php?thread_id=6200756&forum_id=1908

In that thread Erik
explains the workings of the shell hack, so I understand why
perl on my remote nodes complains: 
'Can't open perl script "/proc/self/fd/3"',
but it doesn't explain why regular users are denied permission to fd 3.

I have no problem running these scripts as root, so it really
does appear to be a permission problem.  What can I change 
so regular users can read /proc/self/fd/3 on all the nodes?

Thanks for any help!

-Frank