Prior to indexing WP 2.8, I made a long-overdue fix to my WordPress hooks index. It now indexes hooks called by
do_action_ref_array(), something that earlier versions omitted.
As a result, you may find that some hooks that were defined prior to 2.8 show up in my site as being added in 2.8. Well, now you know why. When I have more time, I’ll go back and re-index all the earlier versions to correct this.