do you think that you need to update the server ownCloud?
I thought that if you use the standard carddav version changes should not affect the connection.
I used 3 phones, two of them connect to the 3rd phonebook, on the third one.
The result is the following:
Phone 1 (Android 4.2.2.) Is synchronized with the address book number 3 (with 1 and 2 does not work)
Phone 2 (Android 4.2.2.) Is synchronized with the phonebook 1 and 2 only when you add a contact, add a contact to more accurately ownCloud, but no more synchronized. 3 phone book all right.
3 Phone (Android 4.2.2.) - The same as the phone 2, but connected only Phonebook 2 similar way, add in the fact that the phone is on ownCloud server, but most of the synchronization does not occur.
there are 4 phone, the old version 0.6 adapted for Androyd 2,2,6, it all works and how to work.
check if everything is all recorded on the server, I’ll reinstall DAVdroid