Insecure $ENV{PATH} while running setuid at /etc/w

I have this problem on my Debian installation

Insecure $ENV{PATH} while running setuid at /etc/webmin/virtual-server/lookup-domain.pl line 10. procmail: Program failure (255) of "/etc/webmin/virtual-server/lookup-domain.pl" procmail: Unable to treat as directory "/nonexistent/Maildir"

This appears to only occur with root messages at this time. I just changed from mbox to Mdir as per conversation in in the webminlist.

There is no Maildir in the root home directory.

I created one but it still gives the same message.

How to I fix this?

Thanks Shanta