Hi, I was able to figure out the Settings on Options page under "Network Options", but now the issue I am faced with is
background: I upgraded to version 3.0 from an older version WordPress MU 2.9.2
Now when a registered user tries to create its own site, we encounter an error "Warning: include_once(/home/legisblg/public_html/wp-admin/includes/mu.php) [function.include-once]: failed to open stream: No such file or directory in /home/legisblg/public_html/wp-content/mu-plugins/signup-language.php on line ..".
I looked in the code of signup-language.php and was surprised to note that it was pointing to a missing mu.php in folder [/home/legisblg/public_html/wp-admin/includes/]. I would appreciate any help on this which could lead to us getting this error fixed.