After upgrading our DNS/DHCP server to 6.5sp2 from 6.0, when attempting to
load NAMED, we get the following:

error: zone 'RootServerInfo' designated server is not available
critical: loading configuration failure
critical: (exiting due to fatal error)
DNS Server is unloaded successfully
DNS server exiting

We used NSLOOKUP IP_of_firewall and it's "reading correctly"

Any other ideas?