possible error with config due to clam upgrade

[PSI Mailbag]

> as example:
> Warning: lstat() failed on:
> /var/spool/MailScanner/incoming/31494/MESSAGEIDISHERE/tnef.31494

This problem matches up with issues I was seeing as well. Upgrading to
the latest MailScanner release will fix it, as the tnef processing has
been updated to correct the permission errors.

(see http://www.bluequartz.us/phpBB2/viewtopic.php?t=87165 for
reference, and "16 Fixed permissions and ownership problems with data
extracted from TNEF winmail.dat attachments." under fixes of 4.76.24-3
from  http://www.mailscanner.info/ChangeLog).

 Cheers,
-Joshua