Hi Pete, if you check out the link to the Csound forum referenced earlier (and below) you'll see that sparked my curiosity and I started searching. I ended up finding two threads that referenced this (Csound forum and github). That's why I decided to play around with it. 

You can find the other discussions here:
https://forum.csound.com/t/mandel-csd-new-version/
https://github.com/csound/manual/issues/525

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here