Yoast plugin creates markup validation errors

I am trying to perfect the markup for each of my site’s pages. The ONLY thing I have left is the validation errors created by the plugin. If I disable the plugin (deactivate it), I get the green light from W3C.

E.g. see:

http://validator.w3.org/check?uri=http%3A%2F%2Fwww.interactiontalks.com%2Fmyers-briggspersonality-types-of-teenagers%2F&charset=%28detect+automatically%29&doctype=Inline&group=0&user-agent=W3C_Validator%2F1.3+http%3A%2F%2Fvalidator.w3.org%2Fservices

I would like to fix this, if possible.

Any suggestions, anyone?

http://wordpress.org/extend/plugins/wordpress-seo/