Re: WP 3.0.4 Multisite Breaks BP Forum
“When I manually upgraded to 3.0.4, I overwrote config and htaccess files with default values, I had to update these files with multisite settings to ‘re-enable’.”
But you still have mutlisite tables in the database.
white screen = php error. Until you look in the error logs to find out what is up, none of us can give you much more help.