zend framework 1.5 with firebird support

I looked in the changelog and they have added suport for firebird
http://framework.zend.com/

ENHANCEMENTS AND BUGFIXES IN 1.5
——————————

—

* Zend_Json has been augmented to convert from XML to JSON format
* New Zend_TimeSync component supporting the Network Time Protocol (NTP)
* Improved performance of Zend_Translate with new caching option
* addRoute(), addRoutes(), addConfig(), removeRoute(), removeDefaultRoutes()
methods of Zend_Controller_Router_Rewrite now support method chaining
* Yahoo web service supports Yahoo! Site Explorer and video searches
* Database adapter for Firebird/Interbase
* Query modifiers for fetch and find methods in Zend_Db_Table
* ‘init’ hook to modify initialization behaviour in subclasses Zend_Db_Table,
Rowset, and Row
* Support for HTTP CONNECT requests in Zend_Http_Client
* Support for PHP’s hash() for read/write control in Zend_Cache
* Zend_Cache_Backend_File may be configured to call ignore_user_abort() to
maintain cache data integrity
* Timezone in Zend_Date may be set by locale
* Zend_Cache can now use custom frontend and backend classes

A detailed list of all features and bug fixes in the 1.5.0 release may be found at:

http://framework.zend.com/issues/secure/IssueNavigator.jspa?requestId=10710

A detailed list of all bug fixes between 1.5.0 and 1.5.1 release may be found at:

http://framework.zend.com/issues/secure/IssueNavigator.jspa?requestId=10711