Social Sharing in World News II not passing W3C validation

anyone have any ideas how to get the social sharing feature built into the template to pass w3c? errors such as

Error Line 455, Column 159: element "fb:like" undefined

…rue" width="500" action="recommend" font="arial" colorscheme="light"></fb:like>

and

Error Line 456, Column 26: there is no attribute "size"

<g:plusone size="medium" callback="http://...