CentOS Errata and Security Advisory CESA-2011:0374
thunderbird security update for CentOS 4 1386 x86_64: https://rhn.redhat.com/errata/RHSA-2011-0374.html
The following updated files have been uploaded and are currently syncing to the mirrors:
i386: thunderbird-1.5.0.12-36.el4.centos.i386.rpm
x86_64: thunderbird-1.5.0.12-36.el4.centos.x86_84.rpm
src: thunderbird-1.5.0.12-36.el4.centos.src.rpm