I moved subserver away from parent.
I got an error message resembling this one below, but I didn't take it down.
Trying to move back child under parent, I get this error: Moving virtual server stats.contacti.ca under contacti.ca ..
.. Administration user failed! : Failed to open /home/contacti/fcgi-bin/php5.fcgi.webmintmp.19147 : Permission denied at /usr/libexec/webmin/web-lib-funcs.pl line 1323, line 1.
.. failed! See the error messages above for the reason why.