[kronolith] attendee list

[munzli]

Hi

the WebDAV feature in thunderbird writes the attendee list like this:

BEGIN:VEVENT
....
ATTENDEE;RSVP=TRUE;CN=My 1st Attendee;PARTSTAT=NEEDS-ACTION;
 ROLE=REQ-PARTICIPANT:mailto:mail1 at mail.ch
ATTENDEE;RSVP=TRUE;CN=My 2nd Attendee;PARTSTAT=NEEDS-ACTION;
 ROLE=OPT-PARTICIPANT:mailto:mail2 at mail.ch
...
END:VEVENT

which is ignored by horde. can this be confirmed?
thanks