BuddyPress.org

@slaffik – Can you try creating a new blog post and then check the favorite button on that blog post?

When you mouseover the favorite button, you should see:
hxxp://domain.com/activity/favorite/ACTIVITY_ID/?_wpnonce=xxx.

If the activity ID is blank, that means the code couldn’t find an activity id for the blog post.

I’ve noticed that some old blog posts do not work because the activity item_id and secondary_item_id in the database are wrong.