[CalendarServer-dev] ATTACHMENT property

hey all. i have a Cosmo bug (<https://bugzilla.osafoundation.org/show_bug.cgi?id=7951>) that revolves around a CS-generated iCalendar object containing an ATTACHMENT property: ATTACHMENT:http://www.example.com/test.jpg RFC 2445 doesn't define an ATTACHMENT property, only ATTACH. does CS actually generate this, or was it hand-crafted somehow? to the best of my knowledge it came to our attention during a CalConnect interop session.