Error Line 70, Column 56: document type does not allow element "div" here; missing one of "object", "applet", "map", "iframe", "button", "ins", "del" start-tag
<div class="art-logo"><a href="/"><div class="art-logo"></div></a></div>
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The mentioned element is not allowed to appear in the context in which you've placed it; the other mentioned elements are the only ones that are both allowed there and can contain the element mentioned. This might mean that you need a containing element, or possibly that you've forgotten to close a previous element.
One possible cause for this message is that you have attempted to put a block-level element (such as "<p>" or "<table>") inside an inline element (such as "<a>", "<span>", or "<font>").
Error Line 216, Column 7: end tag for "div" omitted, but OMITTAG NO was specified
</body>
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You may have neglected to close an element, or perhaps you meant to "self-close" an element, that is, ending it with "/>" instead of ">".
Info Line 48, Column 1: start tag was here
<div id="art-main">
