Hello,
i set up davdroid like in the configuration example (http://demo.owncloud.org/remote.php/caldav/; demo user: test, password: test).
Nexus 4 on Android 4.4.4
Server: ownCloud 7.0; Example-Server on demo.onwcloud.org
The following log was created:
https://gist.github.com/gogo79/57379a714e93bab6b17c#file-issuelog-txt
For further information do not hesitate to contact me.
Best reagrds,
gogo79