WPMU 2.8.6 & BP 1.1.3: No site wide activity feed, delete from wire shows 404

Running WPMU 2.8.6 & BP 1.1.3 with the BP Social theme at lis701.tametheweb.com

Issues:

  1. Site wide activity feed is broken
  2. When logged in as admin and trying to delete from the site wide activity area on the homepage, it shoots up a 404 error

What I've tried:

  • Using the trunk version of BP
    • when I do this the site wide activity widget isn't accessible
    • the RSS feed, however, works just fine
  • I've attempted mixing the bp-activity files between the trunk and stable version with mixed results - non of them stable
  • I've deleted then uploaded new version of BP several times with no success
  • I've ran my install with only the BP plugin suite active and that didn't seem to have any affect

The BuddyPress Themes in Action site seems to be working just fine. The only difference I can tell is that the BPTA site is running WPMU 2.8.5.

It would be lovely if I could get this all stable within a week if possible. I've scoured the buddypress.org forums but can't find a working solution

Any ideas?
~Kyle~
@thecorkboard