Issue with kontact and sychronization with CalDAV

[Christian Wolf]

Hello,

I am using Ubunutu saucy and as far I have all recent upgrades installed.
At the moment I use KDE with kontact. I would like to establish 
synchronization between kontact/korganizer and my egroupware server using 
CalDAV.

First of all: I already have CalDAV on the server working together with two 
android devices and with my laptopo (using thunderbird/lightning). With those 
client sync works so far like a charm. So I guess the server is configured 
correctly.

The problem is the writability of the calendars. I cannot alter the calendar 
in any way (create,alter,delete of appoitnemnts is not possible).

I googled a bit around and found a bug
https://bugs.kde.org/show_bug.cgi?id=303861
and I checked the described problem in the akonadiconsole. In fact it happens 
like in the bug that the ACLs are all unset and the AccessRights is an empty 
string. If I modify the string to a I get write access to the calendar and I 
think all works well. Unfortunately after a sync process the rights get 
cleared again.
Thus it is not long-term option to modify the ACLs manually as this would have 
to be done every 5 minutes.

Accordingto the bug report it is fxed upstream in KDE 4.9.3. My actual 
installations says I am running 4.11.5.

Now my questions are:
Can anybody confirm this behavior?
Can this bug be still in the ubuntu KDE binary package due to any ubuntu-
specific patches?
Do you know of a similar bug/problem that is NOT yet fixed?
Can you give me more advice?

Thanks a lot and kind regards
-- 
Grüße
Christian Wolf