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.
Fatal error: Cannot redeclare bp_activity_install() (previously declared in …/wp-content/plugins/buddypress/bp-activity.php:19) in …/wp-content/plugins/buddypress/bp-activity.php on line 52
If you have a failed upgrade, I recommend reverting to a “clean” backup of your files and database from before you upgraded Buddypress or attempted reactivation.
Here’s what I did to successfully upgrade from BP 1.0.3 to 1.1.2:
1. Switch to a non-BP theme, i.e. WordPress mu Homepage 1.6
2. Deactivate ALL plugins (you’d probably be okay by deactivating only BP-dependent plugins but I did this just to be safe)
3. Delete Buddypress plugin files (/wp-content/plugins/buddypress) via wp-admin or FTP, either is fine
4. Download the Buddypress 1.1.2 zip and upload the new files to your plugins folder
5. Activate Buddypress plugin in wp-admin
I can’t comment on what changes you have done to your install or what plugins you’re running but I had similar problems with the upgrade and the steps above allowed me to successfully upgrade BP.
