Yeah, just about every auto-posting plugin out there has struggled with the duplicate posting problem for years with no success. It turns out that WordPress doesn't finalize a post immediately and therefore doesn't correctly report duplicates until after the permalink is officially set. Since adding the hook on wp_insert_post_data, which is the very last event in handling a post, we haven't seen any duplicate post problems from AutoBlogged. It was such a big discovery for us we couldn't keep it to ourselves, glad it helped you out with your own bot!Works great. I use it in combination with my own wp post bot![]()
It is working for me except 1 small issue, all duplicates are marked as draft and it is impossible to move them to trash unless I deactivate Dupechecking plugin.
Other than that all seems to be working fine on my latest 3.4.2 WP, thanks!
Question is bit old, but there is nice plugin exists now "Duplicate Title Checker" which does the same thing. You can download plugin from official WP plugin repository. This plugin provides real-time alerts for duplicate or valid post title. Hope it will help someone else too.