@tigermick owncloud doesn’t have an option to disable vcard4 nor does davdroid have such an option 😕 in order to get both to work you’d need to fix the owncloud bug that generates vcards with invalid characters. Can you look in the owncloud forum how this can be repaired… It doesn’t have something to do with DAVdroid I think.
local storage error syncing addressbook
@cevans thanks, It looks like the update was rolled out yesterday.
1.11.1 is now available in F-Droid, too!