[outages] GoDaddy DNS Issues?

We are receiving various reports from our customers (large institutions) indicating that they cannot access our public facing hosts via their FQDNs. We use GoDaddy for DNS. Initial troubleshooting shows that queries to ns50.domaincontrol.com and ns49.domaincontrol.com fail from Windows based caching name servers, however succeed on UNIX/Linux hosts. Verification at our site using dig and nslookup confirms the above. On a windows host the following is returned for all valid and invalid domain names: *** ns50.domaincontrol.com can't find xyz.com: No response from server Can anyone confirm what we are seeing? Thanks and regards, Mike