CENTOS 4.6 - Mail problem after upgrading to 3.54

After upgrading to 3.54 e-mail stopped delivering e-mails
I found:

/bin/sh: /etc/webmin/virtual-server/procmail-logger.pl: Permission denied
/bin/sh: /etc/webmin/virtual-server/clam-wrapper.pl: Permission denied

at procmail.log

In order to fix it i had to:
chmod 755 /etc/webmin/virtual-server (it was 750)

In fact I followed the instructions of:

Fixed in 3.54-3. Apologies for the inconvenience. We were tightening up permissions in /etc/webmin, and there were some unintended consequences.