CentOS Errata and Security Advisory 2008:0977 Critical
https://rhn.redhat.com/errata/RHSA-2008-0977.html

The following updated files have been uploaded and are currently syncing to the mirrors:

i386:
seamonkey-1.0.9-28.el4.centos.i386.rpm
seamonkey-chat-1.0.9-28.el4.centos.i386.rpm
seamonkey-devel-1.0.9-28.el4.centos.i386.rpm
seamonkey-dom-inspector-1.0.9-28.el4.centos.i386.rpm
seamonkey-js-debugger-1.0.9-28.el4.centos.i386.rpm
seamonkey-mail-1.0.9-28.el4.centos.i386.rpm

src:
seamonkey-1.0.9-28.el4.centos.src.rpm