We're getting this error in the dashboard:
Warning: array_key_exists() expects parameter 2 to be array, null given in /home/producti/public_html/wp-content/mu-plugins/wp-super-cache/wp-cache-phase1.php on line 334
Also, the instructions no longer indicate installation should be in MU-Plugins.... we do not want blogs on the site to have control over the plugin, only the super admin, can we continue to add the plugin to mu-plugins? It seems to work fine... perhaps this is related to the error above???