I'm trying to find tasks stored in calendars (who are created by CalDAV with iCal 3). I'm sending this CalDAV call :

REPORT /dav/probert/Projecteur%201%27s%20Calendrier/
...
<x1:calendar-query xmlns:x1="urn:ietf:params:xml:ns:caldav">
<x0:prop xmlns:x0="DAV:">
<x0:getetag/>
<x1:calendar-data/>
</x0:prop>
<x1:filter>
<x1:comp-filter name="VCALENDAR">
<x1:comp-filter name="VTODO">
<x1:prop-filter name="COMPLETED">
<x1:is-not-defined/>
</x1:prop-filter>
</x1:comp-filter>
</x1:comp-filter>
</x1:filter>
</x1:calendar-query>

The problem is that I receive some VEVENT event with this call, even if I put a filter to just get the VTODO items.

Zimbra 5.09 NE.