Welcome to the Q&A Forum

If i understand the question correctly.... Add in a rel=canonical tag to the page which your 'home' tab links to. I would guess that for this to be showing as duplicate content that you may have some subtle difference in the url you are linking to eg www.domain.com, www.domain.com/, www.domain.com/index.html etc Adding in rel=canonical will solve a whole host of issues when linking to the same page using different url's See the SEOmoz best practices guide for a full explanation and examples of how to implement rel=canonical http://www.seomoz.org/learn-seo/canonicalization Hope that helps Justin