rxk14007の日記： CentOS 6.3 がリリース

http://wiki.centos.org/Manuals/ReleaseNotes/CentOS6.3

4. Major changes
 
In accordance with upstream CentOS 6.3 now includes libreoffice as Office suite. The "Desktop" install group will automatically install the complete suite. If you update from a previous version of CentOS 6 using 'yum update' and have openoffice installed, the update will automatically remove openoffice and install libreoffice. See this link for further information.
Upstream has deprecated the matahari API set for operating system management. User who choose to continue to use matahari should - as always - install the updates provided with CentOS 6.3. Matahari will not be part of future upstream releases and therefore also not of future CentOS releases. See here for more information.
There are new tools for moving machines (both Virtual and Physical) from their current format to a Virtual KVM Machine. The packages responsible are called virt-p2v (physical to virtual) and virt-v2v (virtual to virtual). Please see the upstream documentation linked in the further reading section of these release notes for more information on these exciting enhancements.

isoファイルをダウンロードしてインストールちう。
リリースノートを見ると、OpenOffcieからLibreOfficeへの変更、VMの移行ツールの追加などが大きな変更点として記載されている。