I have checked one of our sites (http://www.pantilimon.ro) in w3c validator, and took the congratulation icon HTML code, inserted into my code, but it contains two broken links: http://validator.w3.org/check?uri=referer and http://jigsaw.w3.org/css-validator/check/referer
what to do now?
They're not broken here. Could it be that you have some sort of firewall or proxy that removes the Referer request header?