Autoblog Posts not Showing in Buddypress Activity Stream

Autoblog is working fine, posting to the main blog, and attributing the posts to the correct author. The posts show fine on the main blog. However, they do not display in the buddypress activity stream of the author. Other activity, such as bbpress forum posts, does display correctly in the activity stream -- but not the blog posts. I do not have "Allow activity stream commenting on posts and comments" activated, but don't think that should prevent blog posts from showing in the stream. I've tried the "Repair member 'last activity' data" option available from the Tools menu in Network Admin, to no avail. Any other ideas?