BuddyPress.org

Auwagner-

I\’m running the latest WPMU (2.7)

Then you’re not running either WPMU 2.7.1-beta1 or -beta2?

If that is the case, then this is the issue. WPMU 2.7.1 has been required since BuddyPress r1303.

Fortunately, you’re in luck! WPMU 2.7.1 was just officially released this afternoon. Read this ( http://ocaoimh.ie/2009/04/21/wordpress-mu-271/ ) and get it here: https://mu.wordpress.org/download/