ZF-10055: Zend_Service_Twitter 1.10.6 authentication changes undocumented
The construct of Zend_Service_Twitter is changed since 1.10.6. Before, you just gave a username/password and it took care of the rest.
Now you need to give options in an array and/or a Zend_Oauth_Consumer object. This is undocumented and unclear what a user has to do to be able to use Zend_Service_Twitter.
Apparently, this has something to do with the fact that Twitter doesn't allow HTTP Auth anymore.