Piwik 2.2.0
The new Event Tracking is really interesting. You can track uncaught JavaScript errors on your site for example.
Device detection is now an external library.
device-detector - The Universal Device Detection library will parse any User Agent and detect the browser, operating system, device used (desktop, tablet, mobile, tv, cars, console, etc.), brand and model.
Interesting!
_paq.push(['enableJSErrorTracking']);