I'm using an Android Phone with aCalendar, which syncs to my ownCloud Server, which I also sync via DAV to korganizer. What I found is that aCalendar produces a (to my best knowledge RFC 5545 conforming) event series (RRULE) where one event was deleted - which is defined in the ics file via an UID/RECURRENCE-ID extra event set to STATUS:CANCELLED. I attach this ics file here. You can see that when you import this file as extra calendar into korganizer, it shows nothing - not a single event. It should however show a recurring event, every saturday, except on the 19.July 2014 It seems the problem is that some KDE component does not handle correctly the UID/RECURRENCE-ID extra event but instead just uses this exception event as the single event, which has STATUS:CANCELLED and is therefore not shown at all. Reproducible: Always
Created attachment 87325 [details] calendar file showing the bug
testing with a new user I found out that it works correctly. So it must be something with my current akonadi db ...