Soeben habe ich meine piwik Instanzen auf den aktuellen Release-Stand gebracht und was sehe ich da in den Release-Notes:
Starting from Piwik 1.9.2, Do Not Track browser setting will be ignored for IE 10 browsers. Because all IE10 browsers have DNT enabled, we cannot afford not to record in Piwik all IE10. So we decided to ignore the DNT setting for all IE10 users.
tja...