form_set_error('db_prefix',st('The database table prefix you have entered, %db_prefix, is invalid. The table prefix can only contain alphanumeric characters and underscores.',array('%db_prefix'=>$db_prefix)),'error');
form_set_error('db_prefix',st('The database table prefix you have entered, %db_prefix, is invalid. The table prefix can only contain alphanumeric characters, underscores or dots.',array('%db_prefix'=>$db_prefix)),'error');