I've just done a clean install of Opengoo 1.6, and tried to import an iCal file created using Apple OS X's iCal application.
There are a couple of bugs in the import procedure - I've got a recurring appointment for my work from 8.30am-5pm Monday-Thursday every week, and another for 8.30am-4pm on every Friday.
1. Opengoo imports an appointment every Monday from 9.30am-6pm and one every Friday from 9.30am-5pm.
The file does contain the TZID of Europe/London and I believe this is set the same on my server, but I cannot get on at the moment to verify it.
2. There are a number of "exception" dates, such as 28th Dec-1st Jan (Christmas week) which are in the file as "EXDATE" but Opengoo is not using these and sticking the recurrence in anyway.
I'm happy to PM the iCal file to someone but I'd rather not put it up for public viewing as it's my personal calendar.
PS. This is on PHP 5.2.10, MySQL 5.1.37 on an Apache 2.2.14 Solaris server.
Many thanks,
Andy