title: Facebook iOS SDK 3.6 startWithGraphPath completion block not executed
body: <p>I've integrated with Facebook so that I can, among other things, post statuses to my feed. I  based some of my code off of the <a href="https://developers.facebook.com/docs/howtos/publish-to-feed-ios-sdk/" rel="nofollow">publish to feed developer tutorial</a>. When running the following Graph API request from my iOS application the completion block of the request is never called and no error appears in the XCode debug log.</p>
  
  <pre><code>[FBRequestConnection
  startWithGraphPath:@"me/feed"
  parameters:params
  HTTPMethod:@"POST"
  completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
      if (error) {
          DLog(@"error: domain = %@, code = %d", error.domain, error.code);
      } else {
          DLog(@"Posted action, id: %@", result[@"id"]);
      }
  }];
  </code></pre>
  
  <p>I have two convenience functions that perform checks against the current <code>activeSession</code> before executing this request. They look like this:</p>
  
  <pre><code>+ (BOOL)facebookSessionIsOpen {
      return (FBSession.activeSession.isOpen);
  }
  
  + (BOOL)facebookSessionHasPublishPermissions {
      if ([FBSession.activeSession.permissions indexOfObject:@"publish_actions"] == NSNotFound ||
          [FBSession.activeSession.permissions indexOfObject:@"publish_stream"] == NSNotFound ||
          [FBSession.activeSession.permissions indexOfObject:@"manage_friendlists"] == NSNotFound) {
          return NO;
      } else {
          return YES;
      }
  }
  </code></pre>
  
  <p>Both of these functions return <code>YES</code> indicating an active session with the necessary publishing permission. What's more confusing is that I can pull the user's profile without issue after performing the same checks successfully (granted publishing permissions are not required to pull the profile) using the following code:</p>
  
  <pre><code>[FBRequestConnection
  startWithGraphPath:@"me"
  parameters:[NSDictionary dictionaryWithObject:@"picture,id,birthday,email,location,hometown" forKey:@"fields"]
  HTTPMethod:@"GET"
  completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
      NSDictionary* resultDict = (NSDictionary*)result;
  
      NSString* emailAddress = resultDict[@"email"];
      NSString* location = resultDict[@"location"][@"name"];
      NSString* birthday = resultDict[@"birthday"];
      NSString* homeTown = resultDict[@"hometown"][@"name"];
      ...
  }];
  </code></pre>
  
  <p>Any suggestions on how to debug this issue?</p>