Take a look at this site - a similar website
http://www.midaswebseo.com/
this one has 9 validation warnings on a professional SEO site ??
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http://www.webandrank.com/
this one has 9 warnings and 1 error on their site
would you hire one of these
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you only have 7 warnings
might want to use HTML Tidy to correct these
http://infohound.net/tidy/
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hope this helps
falcon