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Meta robots fails and appears as an unregistered value in HTML5 validation. (of course this meta is registered, exists and is currently in use in millions of websites). Validation fails with the following message: =============== Bad value robots for attribute name on element meta: Keyword robots is not registered. <meta name="robots" content="index,follow" /> =============== For the same URL, the html5 validation from validator.nu passes full OK. For testing, I used this URL http://www.artmajeur.com/en/ Thank you
Thanks for reporting this. The problem was caused by a coding mistake a made yesterday but I've now fixed it.