title: Problem with whitespace before doctype
body: <p>I got some strange problem where i have 2 copies of same website in 2 different folders. In one of those 2 copies has whitespace before doctype declaration so i have problems to work with facebook as document is formated incorrectly.</p>
  
  <p>Before html there is some php calculations, but there is no echo statements or something.</p>
  
  <p>What could be cause for 2 identique websites under same server in different folders, one having this issue?</p>