[CentOS] Missing Thunderbird Updates

Hello,

I recently noticed that Thunderbird updates are missing from CentOS 5.

First, I noticed that Thunderbird 2.0.0.19 is available in the
"updates" repo of CentOS 5.2, but not on the "updates" repo of CentOS
5.3. The version in the "os" repo of CentOS 5.3 is 2.0.0.18.

- Thunderbird 2.0.0.19 in CentOS 5.2 updates repo:
http://mirror.centos.org/centos/5.2/updates/i386/RPMS/thunderbird-2.0.0.19-1.el5.centos.i386.rpm

- Thunderbird 2.0.0.18 in CentOS 5.3 os repo:
http://mirror.centos.org/centos/5.3/os/i386/CentOS/thunderbird-2.0.0.18-1.el5.centos.i386.rpm

- No Thunderbird in CentOS 5.3 updates repo:
http://mirror.centos.org/centos/5.3/updates/i386/RPMS/

Then I went upstream to confirm which versions were available there.
To my surprise, I found out that there is a src rpm for Thunderbird
2.0.0.21 that dates from March 22.

- Thunderbird 2.0.0.21 SRPM in RHEL 5Client:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/thunderbird-2.0.0.21-1.el5.src.rpm

CentOS Developers, could you please build the RPMs for the latest
version 2.0.0.21, and investigate why the issue with 2.0.0.19 not
being present in the "updates" repo 5.3 happened, and why the new
package 2.0.0.21 was not rebuilt even though it dates from more than
one month ago?

Thanks!
Filipe