When installing Wordpress MU, I’ve noticed the :
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* Do not try to create this file manually. Read the README.txt and run the
* web installer.
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but as I wanted to use my own DB table prefixes I’ve ignored this and filled out the wp-config-sample.php with my details and changed to wp-config.php and uploaded as I would do with single WP.
This lead to all sort of errors like : “Warning! VHOST must be ‘yes’ or ‘no’ in wp-config.php” [...]