title: MKPointAnnotation leaks memory in title
body: <blockquote>
  <pre><code>MKPointAnnotation *pa = [[MKPointAnnotation alloc] init];
  pa.coordinate = mapView.userLocation.coordinate;
  pa.title = [NSString stringWithFormat:@"place name"];//memory leaks here
  [mapView addAnnotation:pa];
  [pa release];
  </code></pre>
  </blockquote>
  
  <p>While running code using profiler I found that memory is leaking at tiitle, any idea how to solve this issue.</p>