Support menu_blocks module.

Think

/**
 * Get the menu which is defined as the power menu
 */
function power_menu_get_menu() {

//...

  $result = db_query("SELECT b.* FROM {blocks} as b LEFT JOIN {blocks_roles} AS r ON b.delta = r.delta
  	WHERE b.module='menu' AND status=1 
  	AND theme='%s' AND b.delta IN (" . db_placeholders($menus, 'varchar') . ")
  	AND (r.rid IN (". db_placeholders($rids, 'int') .") OR r.rid IS NULL) ", $args);

//...

}

should be reviewed and rewritten somehow.