A new update is available for Fedora Core - Fedora Core 3 Update: squid-2.5.STABLE11-1.FC3. Here the announcement:

Fedora Update Notification
FEDORA-2005-915
2005-09-23
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Product : Fedora Core 3
Name : squid
Version : 2.5.STABLE11
Release : 1.FC3
Summary : The Squid proxy caching server.
Description :
Squid is a high-performance proxy caching server for Web clients,
supporting FTP, gopher, and HTTP data objects. Unlike traditional
caching software, Squid handles all requests in a single,
non-blocking, I/O-driven process. Squid keeps meta data and especially
hot objects cached in RAM, caches DNS lookups, supports non-blocking
DNS lookups, and implements negative caching of failed requests.

Squid consists of a main server program squid, a Domain Name System
lookup program (dnsserver), a program for retrieving FTP data
(ftpget), and some management and client tools.

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* Fri Sep 23 2005 Martin Stransky <stransky@redhat.com> 7:2.5.STABLE11-1.FC3
- update to STABLE11


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

c9e608c609b5886eb6d8b72ec2685b9a SRPMS/squid-2.5.STABLE11-1.FC3.src.rpm
18c100bced6661d3c3e54917e0e1f187 x86_64/squid-2.5.STABLE11-1.FC3.x86_64.rpm
aa771a75ee39341822ad6d9f544aeee6 x86_64/debug/squid-debuginfo-2.5.STABLE11-1.FC3.x86_64.rpm
6805a343752c38bdda8c6261b933bf87 i386/squid-2.5.STABLE11-1.FC3.i386.rpm
62bd18bd99f6618496d03fe47579ada8 i386/debug/squid-debuginfo-2.5.STABLE11-1.FC3.i386.rpm

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