title: Facebook SDK 3.5 FBSession openWithCompletionHandler isn't calling the completion handler
body: <p>I am trying to just get some basic info from facebook in my app. I run this code:</p>
  
  <pre><code>FBSession *session = [[FBSession alloc] initWithAppID:APP_ID permissions:nil defaultAudience:FBSessionDefaultAudienceEveryone urlSchemeSuffix:nil tokenCacheStrategy:nil];
  NSLog(@"I get this message");
  
  [session openWithCompletionHandler:^(FBSession *session, FBSessionState status, NSError *error) {
      NSLog(@"It never calls this");
  }];
  </code></pre>
  
  <p>It seems the handler is just never called. I am taken to facebook and brought back but nothing happens. Anyone have any ideas?</p>