OpenSUSE Install :: RSA Key Authentication With 11.3

I've got a server that was running 11.0 and was set up so that a number of other machines could connect to it via ssh without needing a password by using rsa key authentication. This has worked for a couple of years without problem. I have just progressively upgraded 11.0->11.1, 11.1->11.2 and 11.2->11.3 so now I'm running 11.3 and the above authentication is not working.

My logs show the errors gkr-pam: couldn't get the password from user: Conversation error error: ssh_msg_send: write pam_unix2(sshd:auth): conversation failed error: ssh_msg_send: write

when the automated logins are attempted. Are there any configuration changes that need to be made to get this to work again with 11.3?