title: Can NSDictionary contain different types of objects as values?
body: <p>Why does the following result in a BAD_ACCESS error?</p>
  
  <pre><code>NSDictionary *header=[[NSDictionary alloc]initWithObjectsAndKeys:@"fred",@"title",1,@"count", nil];
  </code></pre>
  
  <p>Can you have different types of objects as values in NSDictionary, including another NSDictionary?</p>