title: iOS JSONKit objectWithData returns null
body: <p>I'm using <code>JSONKit</code> to parse JSON strings, for some reason when trying to assign the JSON string into <code>NSDictionary</code> it returns null</p>
  
  <pre><code>
  JSONDecoder *jsonDecoder = [[JSONDecoder alloc] initWithParseOptions:JKParseOptionNone];        
  NSData *jsonData = [NSData dataWithBytes:[jsonString UTF8String] length:[jsonString length]];
  NSDictionary *tempDict = [jsonDecoder objectWithData:jsonData];
  </code></pre>
  
  <p><code>jsonString</code> holds the content, tempDict equals <code>NULL</code></p>
  
  <p>Thanks!</p>