title: Selective Forbidden error
body: <p>I am experiencing a weird problem.</p>
  
  <p>I have a contact form written in php, in several computers the page works without any problems,
  but in two specific computers, as i send the form i get a 403 error.</p>
  
  <p>even weirder is, if the form isn't filled correctly, it doesn't give me the 403.</p>
  
  <p>I gave every folder and file that might be related to that page 0755 permissions, so i don't think that's the problem.</p>
  
  <p>Anyone know what might be the problem?</p>
  
  <p>Thanks!</p>