Line 7, Column 115: Attribute xmlns:fb not allowed here.
Line 7, Column 115: Attribute with the local name xmlns:fb is not serializable as XML 1.0.
Line 31, Column 41: Bad value og:title for attribute name on element meta: Keyword og:title is not registered.
Line 32, Column 196: Bad value og:description for attribute name on element meta: Keyword og:description is not registered.
Line 33, Column 78: Bad value og:image for attribute name on element meta: Keyword og:image is not registered.
Don’t fix these, they’re Facebook’s fault.
Line 41, Column 54: Bad value X-UA-Compatible for attribute http-equiv on element meta.
I think you have a HTTP header with X-UA-Compatible, which makes the element redundant. Also, do you really need it to say IE=7 rather than IE=Edge ?
Line 315, Column 212: Bad value _new for attribute target on element a: Reserved keyword new used.
Use _blank instead.
Line 315, Column 256: An img element must have an alt attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Fix this one. A user with images disabled won’t know where the link goes. Should be
alt="As seen in the NEW YORK POST"
Line 315, Column 256: The border attribute is obsolete. Consider specifying img { border: 0; } in CSS instead.
Just do it.
Line 354, Column 30: The language attribute on the script element is obsolete. You can safely omit it.
Omit it.
Line 378, Column 74: End tag h1 seen, but there were open elements.
Line 382, Column 112: End tag h2 seen, but there were open elements.
Line 409, Column 66: End tag h1 seen, but there were open elements.
Fix these.
Line 573, Column 56: Duplicate ID search.
Fix this (just rename one of the 'search’es).
Also fix the rest of the errors.
Not too hard, was it?