title: Facebook SDK login sometimes gives email but not always
body: <p>I am seeing some weird behavior when logging in to FB with the new iOS SDK.  This is running against iOS 6, with no stored FB credentials.</p>
  
  <p>When I successfully login to FB, I am writing the user dictionary (FBGraphUser) to the console.</p>
  
  <p>My initial request is using the "me" graph path, type=user, and fields=id,name,username,email,location,gender.</p>
  
  <p>For some accounts I get the email address returned, which seems to be the email address I just signed into FB with.  But, for many other accounts, I get the requested data with no email.</p>
  
  <p>I do not see any difference in the FB settings or accounts, and the code path is identical for all cases.</p>
  
  <p>Why would FB return the email for some users and not for others??</p>
  
  <p>Thanks for any insight.</p>