This plugin adds the xmlns:addthis="http://www.addthis.com/help/api-spec" entry to the HTML tag. This head entry is required to make it Valid XHTML. More info at http://www.addthis.com/help/client-api#valid-xhtml
Requires: 2.9 or higher
Compatible up to: 4.1.8
Last Updated: 2014-12-16
Active Installs: 200+
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