I am running ownCloud 9.1.0 (stable) and have problems with the calendar privacy settings - not only in the new version.
1) If a user shares his calendar to other users, owncloud doesn't care about the privacy settings. So although a calendar entry which is marked as "privat" is also visible to me.
2) I get also notifications for calendar entries from other users. For example another user shares his calendar and set up notifications for some of his events. I will also get those notifications.
Will this ever be fixed? I think privacy is an important topic when sharings calendars to other people.