Index: rolereference.module
===================================================================
--- rolereference.module	(revision 466)
+++ rolereference.module	(working copy)
@@ -48,7 +48,7 @@
   $form = array();
   $form['referenceable_roles'] = array(
     '#type'          => 'checkboxes',
-    '#title'         => t('Roles that can be referenced'),
+    '#title'         => t('Roles that can be referenced (check none to enable all)'),
     '#multiple'      => TRUE,
     '#default_value' => is_array($settings['referenceable_roles'])
       ? $settings['referenceable_roles']
@@ -249,5 +249,12 @@
       }
     }
   }
+  // If no roles are enabled, then select ALL roles.
+  if(empty($roles)) {
+    foreach($referenceable_roles AS $rid => $enabled) {
+      $roles[$rid] = $user_roles[$rid];
+    }
+  }
+
   return $roles;
 }
\ No newline at end of file