Piwik graph comparison

I have just install piwik and it works! great… But i am looking at Demo of piwik http://demo.piwik.org which has pretty nice graph comparion matric which is not available in my piwik. is this plugin ? could you please let me where do i get this one?

It’s a new version in Piwik 1.8 RC 301 Moved Permanently

@Matt - Great!!! is it safe to put 1.8RC on production ?