Hola
En vez de Transitional prueba con Strict
Cita: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta name="http-equiv" content="Content-type: text/html; charset=UTF-8"/>
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