In Kohana 2.4, ORM no longer does the find_all() call for us when we

retrieve related ORMs.  If we tack a find_all() on the end, it breaks
the User_Definition interface so create User_Model::groups() and
Groups_Model::users() as glue.

modules/user/models/group.php

@@ -33,6 +33,10 @@ class Group_Model extends ORM implements Group_Definition {
     module::event("group_deleted", $old);
   }
 
+  public function users() {
+    return $this->users->find_all();
+  }
+
   public function save() {
     if (!$this->loaded()) {
         $created = 1;