W3C Validator - eror

Hi,
really need your help ! I can not be validated by W3C Validator on the site http://www.kazan.vperemen.com
1. gkVideoBlock

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Line 836, Column 140: Bad value {handler: 'iframe', size: {x: 640, y: 480}} for attribute rel on element a: The string {handler: is not a registered keyword. …ndler: 'iframe', size: {x: 640, y: 480}}">Алексей 34 года</a><!-- /noindex -->   


2. schema.org/Blog"

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Section lacks heading. Consider using h2-h6 elements to add identifying headings to all sections. …            <section class="blog-featured" itemscope itemtype="http://schema.org/Blog">


3. <gavern:social>

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Element name gavern:social cannot be represented as XML 1.0.

4. <gavern:social>

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Element gavern:social not allowed as child of element body in this context. (Suppressing further errors from this subtree.)

I would be grateful for any help )

Oh, and also , on page materials: http://www.kazan.vperemen.com/lechenie-igromanii
1. Bad value image for attribute name on element meta: Keyword image is not registered.

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Error Line 13, Column 123: Bad value image for attribute name on element meta: Keyword image is not registered. …an.vperemen.com/media/k2/items/cache/4147ca3af8bf81f64b5d738c371bfecb_M.jpg" />


2.

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Error Line 266, Column 229: Bad value {handler: 'image'} for attribute rel on element a: The string {handler: is not a registered keyword. …редварительного просмотра изображения"> <img src="/media/k2/items/cache/4147ca…


Any body hear?

Hello,

You can ignore most of the errors - the only issue is gavern:social - please make sure that you have enabled the GK Cache plugin if you are using the cache in Joomla.

ok) thank you!!!