So, what's new in this release?
Improved Extbase and Fluid
Extbase now supports sorted records, multivalued operands (corresponding to MySQL "IN (...)" queries), counting of results and has support for IRRE. Additionally, the configuration management has been cleaned up. This cleanup breaks backwards compatibility if you previously used FlexForm configurations inside Extbase.
In Fluid, there have been many fixes for the Inline ViewHelper Syntax introduced in beta2. Many ViewHelpers now work nicely together with this syntax, including the "if" ViewHelper and all "format" ViewHelpers. Additionally, the parser has been adjusted so that all strings are parsed as Fluid syntax.
See a full list of backwards compatibility-breaking changes, and if there is any problem, please report it to the issue tracker on Forge.
Any usage of deprecated functions in TYPO3's PHP API or TypoScript is written to a deprecation log in typo3conf. Developers should check the log entries and update their extensions since these deprecated functions will be removed completely by TYPO3 4.5 at the latest.
Advanced Frontend Editing
The advanced Frontend Editing that was integrated to the Core with the first beta release has seen improvements in its CSS styling and in bringing frontend editing forms more in line with backend editing forms. There have also been improvements to Edit Panels for tables other than tt_content and for usage with TYPO3's built-in static templates for pages.
More than 90 issues fixed
In addition to the previously mentioned changes, more than 90 issues have been fixed in the last two weeks. Two members of the TYPO3 Core Team have been paid from the TYPO3 Association budget for their work on important bugfixes. This work brings us a huge step closer to a stable TYPO3 4.3.
Next steps to climb the TYPO3 4.3 hill
Please test this beta release as much as possible, especially the new features from the previous alpha and beta releases and those described above! If you're using one of the new features in a project already and discover bugs, please report them immediately to bugs.typo3.org!
If you're upgrading from a previous TYPO3 version, please be sure to execute the database analyzer and update wizard in the TYPO3 Install Tool.
Since we are still in the beta phase, no more features will be integrated and we will continue with bug fixing only. TYPO3 4.3-beta3 is the last beta release and we will turn to the release candidate and the final version of TYPO3 4.3 very soon. This means that you can expect the final version to be ready by the end of November 2009.
For a detailed overview of the progress of TYPO3 4.3, have a look at the TYPO3 v4 Development Page, the bugtracker, and the ChangeLog. The list of pending documentation in the wiki describes the new properties and tells how they can be used.
You can download the packages at typo3.org/download/packages/.