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Can you take a look at this page http://www.pizza-schule.de/kontakt.php The Validation Output: 1 Error On this page there isn't this input field. <input type="hidden" name="PHPSESSID" value="cvfnq826hg902o7viplc94ai33" />
Oh yes there is, but it only appears if the cookie PHPSESSID is not set. Clear all your cookies, reload the page, and you’ll see it.