BuddyPress.org

Same problem here, sitewide activity feed doesn’t work (404 page not found) and I also can’t delete activity stream items (404 page not found).

I’m running wpmu 2.8.6 and bp 1.1.3 (subdirectories).

I tried reverting back to bp 1.0.3 from backup, then completely removing bp (deactivate plugin and delete folder), then uploading bp 1.1.3 via FTP and then activating, and installed new default themes. Aforementioned problems are still there.