$rdqm                 => C3 A2 E2 82 AC EF BF BD
   decode 'UTF-8'        => 00E2 20AC FFFD
   encode 'Windows-1252' => E2 80 ??
   [error handling]      => E2 80 3F
   decode 'UTF-8'        => ???? ???? 003F
   [error handling]      => FFFD FFFD 003F