When I try to enable network setup on my WP installation, I get the following error after completing the steps on the codex page. Everyting is done as instructed, but I get a 500 internal server error, and in my error log, the following error is present.
[Tue Dec 20 13:24:15 2011] [alert] [client 24.15.204.31] /home/caringa/public_html/blog/.htaccess: Invalid command '\xa0', perhaps misspelled or defined
by a module not included in the server configuration, referer: http://myeatingdisorder.sytes.net/blog/wp-admin/network.php