title: Convert NSString to NSDate results in NULL
body: <p>I want to convert the following date: 2010-02-01T13:58:58.513Z</p>
  
  <p>Which is stored in a <code>NSString</code>to and <code>NSDate</code>.</p>
  
  <p>The following however just shows "NULL" in the debugger</p>
  
  <pre><code>NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
  
  [formatter setDateFormat:@"YYYY-MM-DDTHH:MM:SS.tttZ"];
  
  NSLog(@"Output: %@", [formatter dateFromString:@"2010-02-01T13:58:58.513Z"]);
  
  [formatter release];
  </code></pre>
  
  <p>Ideas?</p>