I want to set up individual blogs for a number of our high school students. Student blogging is a very new concept at our HS and administrators are not comfortable with student blogs being viewed by the “general public�. Is there a way to make wpmu blogs “private�, perhaps restricting viewing to registered users? I have used successfully used Registered Only on a single wp install, but with wpmu got a string of messages like the following:
Warning: Cannot modify header information - headers already sent by (output started at /home/easternh/public_html/wp-inst/wp-content/themes/default/header.php:5) in /home/easternh/public_html/wp-inst/wp-content/mu-plugins/registered_only.php on line 63
I could handle having the whole wpmu install being restricted in this way, not necessarily something that is at the individual blog level.
Thanks in advance for any suggestions.