A new update is available for Fedora Core - Fedora Core 3 Update: caching-nameserver-7.3-4.FC3. Here the announcement:

Fedora Update Notification
FEDORA-2005-1174
2005-12-19
---------------------------------------------------------------------

Product : Fedora Core 3
Name : caching-nameserver
Version : 7.3
Release : 4.FC3
Summary : The configuration files for setting up a caching name server.
Description :
The caching-nameserver package includes the configuration files which
will make BIND, the DNS name server, act as a simple caching nameserver.
Many users on dialup connections use this package along with BIND for
such a purpose.

If you would like to set up a caching name server, you'll need to install
the caching-nameserver package; you'll also need to install bind.

---------------------------------------------------------------------

* Sun Dec 18 2005 Jason Vas Dias<jvdias@redhat.com> 7.3-4
- update for version differences FC-3 -> 4 -> 5
- fix bug 176185


---------------------------------------------------------------------
This update can be downloaded from:
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/3/

6e29262c9c1592b7b7facc8c80b7e768 SRPMS/caching-nameserver-7.3-4.FC3.src.rpm
fc6b1e93c6bd19fd47c1d88bc12bde11 x86_64/caching-nameserver-7.3-4.FC3.noarch.rpm
fc6b1e93c6bd19fd47c1d88bc12bde11 i386/caching-nameserver-7.3-4.FC3.noarch.rpm

This update can also be installed with the Update Agent; you can
launch the Update Agent with the 'up2date' command.