Zotero import error

The Zotero plugin v. 1.2 is generating the following Fatal error when attempting import using the current Omeka v 1.4.2.:

Class 'Zend_Service_Abstract' not found in /omeka/application/libraries/Zend/Rest/Client.php on line 40

Any thoughts on a solution?

Thanks.

Closing, cross-posted to dev list.