I just upgraded to 2.2 from 2.1.3.
My blog was W3C valideted now as you can see http://validator.w3.org/check?uri=http%3A%2F%2Fwww.paolo.valenti.name%2F&charset=%28detect+automatically%29&doctype=Inline&ss=1&outline=1&No200=1&verbose=1
there are 27 errors all in xmls and rdf .
element "rdf:RDF" undefined.
there is no attribute "dc:identifier".
there is no attribute "trackback:ping".
and so on
What I can do ?