title: didFailToRegisterForRemoteNotificationsWithError is fired, how to get more info?
body: <p>For the first time I am  playing with APNS, I tried to run a proof of concept, with an iOS 5.0.1 device, and the <code>didFailToRegisterForRemoteNotificationsWithError</code> is fired. I know it has been fired because I show an <code>UIAlertView</code> to notify the error:</p>
  
  <pre><code>- (void)application:(UIApplication*)application
     didFailToRegisterForRemoteNotificationsWithError:(NSError*)error
  {
     // Inform the user that registration failed
     NSString* failureMessage = @"There was an error while trying to \
  
       register for push notifications.";
  
     UIAlertView* failureAlert = [[UIAlertView alloc] initWithTitle:@"Error"
                                                        message:failureMessage
                                                       delegate:nil
                                              cancelButtonTitle:@"OK"
                                              otherButtonTitles:nil];
  
     [failureAlert show];
     [failureAlert release];
  }
  </code></pre>
  
  <p>How can I get more info about the error?</p>