I’ve just reinstalled Mu 2.7.1 and Buddypress 1.01 again and this time I can select the bpmember theme from within Mu Admin under Buddypress settings. However, I cannot post from any buddypress field. Every buddypress post action seems to be undefined as wp_explain_nonce is being called.
I can still perform any post action with WordPress Mu.
I moved bp-themes into /wp-content/ as directed but still got the error message.
Under the “Select theme to use for BuddyPress generated pages:” in general settings the option for using the ‘bpmember’ theme was not appearing. I could only select the default wordpress mu themes. I selected the ‘Default’ theme and then renamed the ‘bpmember’ folder to ‘default’ to get this working.