>    Every time that $prefix/cron/run_queue is executed I get a 
>    mail message with errors:
> 
>       Traceback (innermost last):
>         File "/home/staff/mailman/cron/run_queue", line 31, in ?
>           OutgoingQueue.processQueue()
>         File "/home/staff/mailman/Mailman/OutgoingQueue.py", line 86, in processQueue
>           lock_file.lock()
>         File "/home/staff/mailman/Mailman/flock.py", line 119, in lock
>           os.link(self.lockfile, self.tmpfname)
>       os.error: (2, 'No such file or directory')

Well, it appears that 

   $prefix/locks/

had the following permissions:

   drwxrwsr-x   2 root     mailman      1024 Feb  4 23:48 locks/

According to the INSTALL file that shouldn't make a difference,
but chown'ing it to 'mailman' like this

   drwxrwsr-x   2 mailman  mailman      1024 Feb  4 23:48 locks/

got rid of the problem.  I can't figure out why though, since none
of the binaries are setuid.  

Chris