I can confirm that this is still a problem on 13.04. I have noticed it affecting:
ping ssh ntp
I fix by using the following line in /etc/nsswitch.conf:
hosts: files dns
I can confirm that this is still a problem on 13.04. I have noticed it affecting:
ping
ssh
ntp
I fix by using the following line in /etc/nsswitch.conf:
hosts: files dns