Selfcontrolapp.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Attribute “addthis:url” not allowed on element “div” at this point.
Attribute “addthis:title” not allowed on element “div” at this point.
Attribute “addthis:description” not allowed on element “div” at this point.
Attribute “fb:like:layout” not allowed on element “a” at this point.
Attribute “fb:like:href” not allowed on element “a” at this point.
Attribute “tw:url” not allowed on element “a” at this point.
Attribute “g:plusone:size” not allowed on element “a” at this point.
Warnings:
Attribute “addthis:url” is not serializable as XML 1.0.
Attribute “addthis:title” is not serializable as XML 1.0.
Attribute “addthis:description” is not serializable as XML 1.0.
Attribute “fb:like:layout” is not serializable as XML 1.0.
Attribute “fb:like:href” is not serializable as XML 1.0.
Attribute “tw:url” is not serializable as XML 1.0.
Attribute “g:plusone:size” is not serializable as XML 1.0.
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