[Inf-IT DAVcl] Strangeness in appointment duration

Hi, According to screenshot 1, the (whole day) appointment starts at 09-11-2015 and ends at 09-11-2015. However, when I click it to edit, it suddenly ends a day later. This is repetetive, every time I perform click/save the appointment is extended by one day. This is the event info: BEGIN:VEVENT CREATED:20151109T212532Z LAST-MODIFIED:20151109T212659Z DTSTAMP:20151109T212659Z UID:maam0uf0-m5br-9y0p-72dv-m8leis978g31 SUMMARY:Inhalers vervangen✔ TRANSP:OPAQUE CLASS:PUBLIC RECURRENCE-ID;VALUE=DATE:20151109 DTSTART;VALUE=DATE:20151109 DTEND;VALUE=DATE:20151110 END:VEVENT Any idea what's going on here? -- Johan