It is with great pride that the Joomla! community announces to the world the immediate availability of Joomla! 1.5 Stable [Khepri]. As a community of contributors, we have been through celebrations and tribulations. We have had fun, and we have worked hard. We have learned from and helped one another. What started two and a half years ago with a letter to the community has grown into a great opportunity for both the Joomla! project and community to benefit from these efforts and to consider our future.
Site Administrators - Simplicity & Control
At first glance, you will appreciate user interface improvements. The Joomla! 1.5 Administrator is more refined and the main menu simplified. The global configuration was substantially reworked for simpler presentation and greater control.  An important improvement for our international community is having Joomla!'s entire Administrator available in one's own language using language packs made available at joomlacode.org.
Joomla! administrators will find a number of improvements in ease of site management. A single installer is available for all extension types, including languages.  The media manager is improved visually and functionally. Images, documents, presentations, and more, can now be stored. Other improvements include multi-delete capability, batch file uploads, and an ability to view media in icon and list formats. 
The Joomla! Project today announced the immediate release of Joomla! 1.0.14 RC1 [Daybreak], the first and hopefully singular release candidate for the 1.0.14 release cycle. Several security issues have been discovered and addressed for this release. While the required changes are not significant, the number of impacted files are significant and we need your help. Before this release is declared stable we need to ensure that it works as well for you as it does for us.
Those of you that are able and willing please download a copy of 1.0.14 RC1 and test it on a backup copy of your live site. Make sure that the system works as good or better than Joomla! 1.0.13, our current stable release. Any issues that you find please report in the 1.0.x Bug Tracker. If you have questions on how to report a bug you should read the how-to and then if you still have questions please feel free to ask them in our 1.0.x Quality and Testing forum.
Since this release fixes security vulnerabilities, once you have verified on a backup of your site that everything works as expected we suggest that you upgrade your live site to this release.