Invalid parameter: "email" array value must be a non-empty string

#0 /var/www/froggysfog/app/code/community/Fishpig/Wordpress/Block/Feed/Post.php(37): Zend_Feed_Writer_Entry->addAuthor(Array)
#1 /var/www/froggysfog/app/code/community/Fishpig/Wordpress/Block/Feed/Abstract.php(44): Fishpig_Wordpress_Block_Feed_Post->_addEntriesToFeed(Object(Zend_Feed_Writer_Feed))
#2 /var/www/froggysfog/app/code/community/Fishpig/Wordpress/Block/Feed/Abstract.php(25): Fishpig_Wordpress_Block_Feed_Abstract->getFeedWriter()
#3 /var/www/froggysfog/app/code/core/Mage/Core/Block/Abstract.php(919): Fishpig_Wordpress_Block_Feed_Abstract->_toHtml()
#4 /var/www/froggysfog/app/code/community/Fishpig/Wordpress/Controller/Abstract.php(382): Mage_Core_Block_Abstract->toHtml()
#5 /var/www/froggysfog/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Fishpig_Wordpress_Controller_Abstract->feedAction()
#6 /var/www/froggysfog/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('feed')
#7 /var/www/froggysfog/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#8 /var/www/froggysfog/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#9 /var/www/froggysfog/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#10 /var/www/froggysfog/index.php(88): Mage::run('', 'store')
#11 {main}