title: Parse Facebook dialog:andParams causes login screen
body: <p>I have been using the Parse Facebook implementation for a while and now I am getting some weird behaviors after updating.</p>
  
  <p>I am logging in a user successfully using</p>
  
  <pre><code>NSArray *permissions = [NSArray arrayWithObjects:@"user_about_me",
                     @"user_relationships",@"user_birthday",@"user_location",
                     @"email", nil];
  
  [PFFacebookUtils logInWithPermissions:permissions
                                      block:^(PFUser *user, NSError *error) {
                                              if (!user) {
                                                  if (!error) { // The user cancelled the login
                                                      NSLog(@"Uh oh. The user cancelled the Facebook login.");
                                                  } else { // An error occurred
                                                      NSLog(@"Uh oh. An error occurred: %@", error);
                                                  }
                                              }
                                              else if (user.isNew) { // Success - a new user was created
                                                  NSLog(@"Is New");
                                              }
                                              else { // Success - an existing user logged in
                                                  NSLog(@"Existing");
                                              }
                                        }];
  </code></pre>
  
  <p>Which works fine. Now when I want to bring up the post dialog to the user I use</p>
  
  <pre><code>NSMutableDictionary* params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                         @"MY_APP_ID", @"app_id",
                                         caption, @"name",
                                         link, @"link",
                                         description, @"description",
                                         name, @"caption",
                                         picture, @"picture",
                                         nil];
  [[PFFacebookUtils facebook] dialog:@"feed" andParams:params andDelegate:self];
  </code></pre>
  
  <p>Which is bringing up the facebook login popup even though the user is already logged on and is using ios6.0 with the facebook settings configured. </p>
  
  <p>Can anyone help me explain what is happening so that I can avoid the user basically having to sign in more than once just to post?</p>