I'm trying to add some Finnish public holidays to a new Team Calendar, and whether I try to link to the URI
webcal://ical.mac.com/ical/Finnish32Holidays.ics (also tried changing 'webcal://' to 'http://' but no luck)
or else directly import the iCal data as an .ics file, it reports "The uploaded data does not seem to be iCalendar content".
But this same calendar works fine in both Google calendar and Mac OS.
OK, the problem was the preamble (thanks for having me look at the core object def)...
The original file began with
BEGIN:VCALENDAR METHOD:PUBLISH VERSION:2.0 PRODID:-//Apple Inc.//iPhoto//EN X-WR-CALNAME:FI Holidays X-WR-TIMEZONE:America/Los_Angeles CALSCALE:GERGORIAN PREFERRED_LANGUAGE:FI BEGIN:VEVENT
which I simplified to just
BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Apple Inc.//iPhoto//EN BEGIN:VEVENT