yeh, right:"Global Redundancy.No-IP deploys nameservers across the globe to ensure 100% DNS uptime. No one DNS server is at the same data center or utilizes the same Internet connectivity. With 5 nameservers in addition to your nameserver DNS will ALWAYS resolve!"
In fairness, I have a feeling the issue was more of a miscommunication where teh hidden master wasn't able to feed the public slaves with No-IP.
