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.
People have contributed enormous amounts of time and energy to make Joomla! 1.5 what it is today. Developers collaborated over long distances, around the clock, enthusiastically contributing to Joomla!. Hours writing code combined with intense discussions on everything from usability to extensibility have defined many developers' lives over the last two and a half years. Countless others have identified and fixed bugs along the way. Documenters have tracked changes to help make life easier for everyone who uses or develops in Joomla! 1.5. Translators for dozens of languages have prepared language packs. Huge amounts of time and energy have gone into event organization, team management, and infrastructure upkeep. Our forums are overflowing with those asking and answering questions about Joomla! 1.5, helping overcome problems and reaching out to newcomers in a concerted effort to be helpful.
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 core article manager is simpler. Gone are dual editor areas from Joomla! 1.0. Now, a single editor with a "Read More" button for separating the introduction from the full article, supports a more natural writing process. A very popular improvement is Joomla!'s new image manager enabling you to browse media folders to select and insert images directly into your article as you write. There is also more control of article pagination than before.
The complexity of choices and steps in the menu manager for Joomla! 1.0 have been completely redesigned for 1.5 in favor of simplicity and elegance. Usability improvements, such as the ability now to change the menu type, make changing your site much simpler. Any menu item can now be used to designate the default page. Selecting menu types is now an elegant drill down process supported by a new navigation tree; collapsible parameter sections simplify choices and increase productivity. Other helpful interface improvements include contextual tooltips and the ability to sort any menu manager column. 
One of the more significant functional improvements are search engine friendly URLs, easily implemented within the global configuration. With SEF URLs in place, system generated duplicate content is eliminated, greatly improving site search engine optimization.
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.