BuddyPress.org

I’m also running WPMU 2.8.6 and BuddyPress 1.1.3 with subdirectories. I’ve found a rather tedious workaround to get rid of the double entries, but it doesn’t stop them from happening.

From cPanel, go to phpMyAdmin and find the table wp_bp_activity_user_activity_cached. Click on Browse, find the entry you want to delete from the table, and delete it. It’s now gone from the activity stream.