Blog posts stopped showing up in activity feed

We have a WP multisite install with many blogs, and we have been successfully using BuddyPress for the member activity feed:
http://naiwe.com/activity/

Posts stopped showing up after 1/14/13. No change in settings that I can see, and I've tried all the possible solutions found in online searching (checking privacy settings, turning settings off/on, etc.).

Members are growing annoyed; my webmaster is on sabbatical. Can you help?

Janice Campbell
jceved@comcast.net