Index: wp-admin/post.php
===================================================================
--- wp-admin/post.php	(revision 26991)
+++ wp-admin/post.php	(working copy)
@@ -316,6 +316,7 @@
 	break;
 
 default:
+	do_action( 'custom_post_action', $action, $post_id );
 	wp_redirect( admin_url('edit.php') );
 	exit();
 	break;