Deberias cambiar la notacion, algo asi:
Código PHP:
Ver original...
$this->add(new Zend_Acl_Resource('libros'));
$this->add(new Zend_Acl_Resource('libros:listar'),'libros');
...
$this->add(new Zend_Acl_Resource('revistas'));
$this->add(new Zend_Acl_Resource('revistas:listar'),'revistas');
Saludos.