Problem validating virtual server

Using Virtualmin 3.15 on Webmin 1.274

I just ran "Validate Virtual Servers" for the first time after creating a single virtual server, and I'm getting the following error message:

Spam filtering : Procmail configuration file /etc/webmin/virtual-server/procmail/11490126952823 does not call SpamAssassin

Contents of the configuration file identified in the error message are:

| /etc/webmin/virtual-server/ /usr/bin/clamscan
| /usr/bin/spamassassin --siteconfigpath /etc/webmin/virtual-server/spam/11490126952823

It certainly *looks* like it calls SpamAssassin, although I'm not particularly familiar with the structure of procmail files.

Any idea what's going on?

Closed (fixed)