An overview of new features:

* Dojo Integration
o JSON-RPC
o Dojo Data packing
o Dojo View Helper
o Dijit integration with Zend_Form & Zend_View
o Dojo Library Distribution
* SOAP
o SOAP Server
o SOAP Client
o Autodiscovery
o WSDL access
o WSDL Generation
* Preview of Tooling Project in Laboratory (see /laboratory folder)
o Command Line Interface
o Project Asset Management
* Unit Testing Harness for Controllers
* Lucene 2.3 Index File Format Support
* Zend_Session save handler for Database Tables
* Paginator Component
* Text/Figlet Support
* ReCaptcha Service
* Zend_Config_Xml Attribute Support
* Character Set Option for DB Adapters
* Zend File Transfer Component
* New Media View Helpers (Flash, Quicktime, Object, and Page)
* Support in Zend_Translate for INI File Format

From:
http://devzone.zend.com/article/3712-Zend-Framework-1.6-Release-Candidate-1-now-available
http://framework.zend.com

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