I have installed Omeka (most recent version) and everything is working great...except the comments plugin. I get the following error when I try to add a comment as an unauthenticated user:
Omeka has encountered an error
Zend_Http_Client_Adapter_Exception
Unable to Connect to tcp://www.google.com:80. Error #0: php_network_getaddresses: getaddrinfo failed: Name or service not known
#0 /var/www/omeka/application/libraries/Zend/Http/Client.php(1059): Zend_Http_Client_Adapter_Socket->connect('www.google.com', 80, false)
#1 /var/www/omeka/application/libraries/Zend/Service/ReCaptcha.php(494): Zend_Http_Client->request('POST')
#2 /var/www/omeka/application/libraries/Zend/Service/ReCaptcha.php(509): Zend_Service_ReCaptcha->_post('03AHJ_VusbwWz5A...', 'jiri AUGEru')
#3 /var/www/omeka/application/libraries/Zend/Captcha/ReCaptcha.php(239): Zend_Service_ReCaptcha->verify('03AHJ_VusbwWz5A...', 'jiri AUGEru')
#4 /var/www/omeka/application/libraries/Zend/Form/Element.php(1416): Zend_Captcha_ReCaptcha->isValid('', Array)
#5 /var/www/omeka/application/libraries/Zend/Form/Element/Captcha.php(282): Zend_Form_Element->isValid('', Array)
#6 /var/www/omeka/application/libraries/Zend/Form.php(2253): Zend_Form_Element_Captcha->isValid('', Array)
#7 /var/www/omeka/plugins/Commenting/controllers/CommentController.php(53): Zend_Form->isValid(Array)
#8 /var/www/omeka/application/libraries/Zend/Controller/Action.php(516): Commenting_CommentController->addAction()
#9 /var/www/omeka/application/libraries/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch('addAction')
#10 /var/www/omeka/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#11 /var/www/omeka/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(97): Zend_Controller_Front->dispatch()
#12 /var/www/omeka/application/libraries/Zend/Application.php(366): Zend_Application_Bootstrap_Bootstrap->run()
#13 /var/www/omeka/application/libraries/Omeka/Application.php(79): Zend_Application->run()
#14 /var/www/omeka/index.php(23): Omeka_Application->run()
#15 {main}