In a report at I read about the danger of using free themes as they often are the first you see when you google WP theme, but the results are not always as you would expected.  Many of the ones that show up first have been coded with a secret tags to another page as the owner of the free theme is trying to get more links to his page.

If you like to check if your page has a secret code you can get a plugin called TAC  TAC (Theme Authenticity Checker) from WP thats scans your theme to be sure.

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Bjarni Kr