Update Broke NFS Exports

[Jameson]

All of my NFS exports suddenly stopped working last night after
updating my F10 server.  The only thing I can think of that has
changed has been the updates.  In messages, I'm getting:
mountd Warning: Client IP address '192.168.1.55' not found in host lookup
mountd: connect from 192.168.1.55 to proc (0) in mountd: request from
unauthorized host

Is there a new layer of security that has been turned on by default,
that I need to configure?  I've been running without SELinux for
pretty much the entire existence of the box.  My hosts.allow and
hosts.deny have always been empty.  I've been doing all of my blocking
either through my firewall, or application specific conf files.  I'm
allowing my entire local network access to the exports in the exports
file, and allow all local traffic through the firewall.  I'm stumped
as to why this would have started now, unless bind was resolving the
reverse for my local hosts, but has stopped since the update.

Thanks,
=-Jameson