Installation and setting up the account is no problem.
But the account is not visible in the contact-app and no sync-account is there.
Android: 4.1
davdroid: 0.5.1 from f-droid
Server: radicale, only one carddav entry
logcat:
D/AccountTypeManager( 644): Registering external account type=bitfire.at.davdroid, packageName=at.bitfire.davdroid
E/ExternalAccountType( 644): Problem reading XML for external package at.bitfire.davdroid
E/ExternalAccountType( 644): com.android.htccontacts.model.AccountType$DefinitionException: #phoneticName must be supported