I tested Zend_Http_Client incubator version working with Zend_Service_Amazon.
Zend_Service_Amazon has $_httpClient property it owns a Zend_Http_Client object.
And the object is created by following code in Zend_Service_Abstract at line 69.
self::$_httpClient = new Zend_Http_Client();
But Zend_Http_Client incubator version's cunstructor wants a required $uri parameter,
and it's the cause of fatal error.
If Zend_Http_Client incubator version replaces to the current version, it will be fixed.
Also, please update me regarding
ZF-97so I can close that one as well.