// Btn-primary replacement

controllers/admin/AdminContactsController.php

@@ -101,7 +101,7 @@ class AdminContactsControllerCore extends AdminController
 			),
 			'submit' => array(
 				'title' => $this->l('Save   '),
-				'class' => 'btn btn-primary'
+				'class' => 'btn btn-default'
 			)
 		);