In der neuen Versionen wurden Custom Date Range, Performance, Goal Tracking Options, Tracking API, Live! widget und Visitor Log verbessert.
Piwik 1.3 is a significant update that fixes bugs and adds new features, including: Custom Date Ranges, Performance improvements, improved Live! real time widget & Visitor Log, much improved Tracking API, and a lot more.
Changelog: http://piwik.org/changelog/
Highlights und Download: http://piwik.org/blog/2011/04/piwik-1-3-released/