nop, tienes razon, no pone que este desaprobado, pero al validator no le hace mucha gracia el iframe:
Código:
Line 556, column 40: element "IFRAME" undefined
<iframe src="pagina.htm" id="elide"><a href="pagina.htm">pagina</a></iframe>
You have used the element named above in your document, but the document type you are using does not define an element of that name. This error is often caused by incorrect use of the "Strict" document type with a document that uses frames (e.g. you must use the "Frameset" document type to get the "<frameset>" element), or by using vendor proprietary extensions such as "<spacer>" or "<marquee>" (this is usually fixed by using CSS to achieve the desired effect instead).
bichomen