I just upgraded to Piwik 1.3 today, and the first thing that I noticed is that my Live! widget stopped working. Upon further inspection, the visitor log is empty. The overview still has all my visitor data, and the Live! widget updates the counter on refresh. The pages and all user information are gone in the widget. I tried disabling and reenabling the widget from the dashboard. I tried uploading the Live plugin from my local hard drive. Bupkis.