Please fill in this template when reporting a bug, unless you know what you
are doing.
Description of Problem:

I've seen this discussed so I thought it had been reported, but the
failure is still present in 0.99.2.  So:

Attempts to access my mail when configured to use the standard Unix
mbox
spool give "Error while 'Opening folder
spool:/var/spool/mail/jbuck#INBOX':
Could not lock '/var/spool/mail/jbuck' 


Steps to reproduce the problem:
1. Configure mail account to use "Standard Unix mbox spools"
2. Try to read mail


Actual Results:
See message above

Expected Results:
Mail

How often does this happen? 
Every time

Additional Information:

I can fix this problem by making /usr/sbin/camel-lock-helper sgid,
with the group set to "mail".  Please either implement this fix
or solve the problem in some other way.  What worries me is that
someone told me he fixed it by setting the mail directory to 777;
we can't lead people to weaken the security of their systems to
get around bugs.