SyncEvolution

I received an scheduled meeting from a groupwise server and imported into
my evolution calendar after that syncevolution fails with the following
message in client.log:

08:28:54 GMT +0200 [ERROR] - could not encode item as iCal:
20070817T091116Z_21030084

After that message sync stops.

This is the scheduled meeting from calendar.ics:

------------------------------
BEGIN:VEVENT
TRANSP:OPAQUE
X-GWSHOW-AS:BUSY
DTSTART;TZID=(GMT) Greenwich Mean Time %3A Dublin%2C Edinburgh%2C
Lisbon%2C London:20070820T140000
X-GWITEM-TYPE:APPOINTMENT
DTSTAMP:20070817T071116Z
ORGANIZER;CN=OKTAVIA OKTAVIA;ROLE=CHAIR:MAILTO:
OKTAVIA.PO1.DOMAIN1@XXXX.XX
ATTENDEE;CN=XXX XXXXXXX;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;
ROLE=REQ-PARTICIPANT:MAILTO:XXXX.XXXXX@XXXX.XX
ATTENDEE;CN=OKTAVIA.PO1.DOMAIN1@XXXXX.XX;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;
ROLE=REQ-PARTICIPANT;CUTYPE=RESOURCE:MAILTO:OKTAVIA.PO1.DOMAIN1@XXXXX.XX
ATTENDEE;CN=XXXXXX XXXXXX;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;
ROLE=REQ-PARTICIPANT:MAILTO:XXXXX.XXXXXX@XXXXX.XX
ATTENDEE;CN=XXXXX.X.XXXXX@XXXXX.XX;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;
ROLE=REQ-PARTICIPANT:MAILTO:XXXXX.X.XXXXX@XXXXX.XX
ATTENDEE;CN=XXXXXX.XXXXX@XXXXX.XX;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;
ROLE=REQ-PARTICIPANT:MAILTO:XXXXXX.XXXXX@XXXXX.XX
ATTENDEE;CN=XXXXXX XXXXX (XX/XXX);PARTSTAT=NEEDS-ACTION;RSVP=TRUE;
ROLE=REQ-PARTICIPANT:MAILTO:XXXXXX.XXXX@XXXXXXX.XX
DTEND;TZID=(GMT) Greenwich Mean Time %3A Dublin%2C Edinburgh%2C Lisbon%2C
London:20070820T170000
UID:20070817T091116Z_21030084
PRIORITY:5
CREATED:20070820T060200
LAST-MODIFIED:20070820T060200
END:VEVENT
END:VCALENDAR
------------------------------

I use:
Ubuntu Edgy
syncevolution-0.6
2.10.1-0ubuntu2
and sync against ScheduleWorld.