title: Facebook App : This must be derived from Canvas URL, Secure Canvas URL
body: <p>Hi I wan't to create a facebook app to use it for the auth in my new site locally installed(my machine),but from yesterday I don't succeed to install it and use it, all time I have this very strange error when I wan't write a domain in the "App Domains" : </p>
  
  <blockquote>
    <p>This must be derived from Canvas URL, Secure Canvas URL, Site URL, Mobile Site URL, Page Tab URL or Secure Page Tab URL. Check and correct the following domains</p>
  </blockquote>
  
  <p>the domain of my application is <code>http://localhost/project/app_dev.php/</code> it dosn't work I change it by a real url such as : <code>http://www.exemple.com/</code>,but I had the same error,and just I notice that I see this error when I create an app with new look of facebook (yesterday)...</p>