we had a problem yesterday, where the body was empty. is this todo related?
this problem didn't occur again today.

exception 'Zend_Http_Client_Exception' with message 'Unable to read response, or response is empty' in /home/magento/www/magento1420/lib/Zend/Http/Client.php:989
Stack trace:
#0 /home/magento/www/magento1420/lib/Varien/Http/Client.php(61): Zend_Http_Client->request('POST')
#1 /home/magento/www/magento1420/app/code/community/Bonusbox/Bonusbox/Model/Client.php(50): Varien_Http_Client->request('POST')
#2 /home/magento/www/magento1420/app/code/community/Bonusbox/Bonusbox/Model/Client.php(164): Bonusbox_Bonusbox_Model_Client->requestResource('success_pages', true, Array)
#3 /home/magento/www/magento1420/app/code/community/Bonusbox/Bonusbox/Block/Checkout/Success.php(16): Bonusbox_Bonusbox_Model_Client->requestSuccessPage(Object(Mage_Sales_Model_Order))
#4 /home/magento/www/magento1420/app/code/core/Mage/Core/Block/Abstract.php(757): Bonusbox_Bonusbox_Block_Checkout_Success->_beforeToHtml()
#5 /home/magento/www/magento1420/app/code/core/Mage/Core/Block/Text/List.php(43): Mage_Core_Block_Abstract->toHtml()
#6 /home/magento/www/magento1420/app/code/core/Mage/Core/Block/Abstract.php(758): Mage_Core_Block_Text_List->_toHtml()
#7 /home/magento/www/magento1420/app/code/core/Mage/Core/Block/Abstract.php(525): Mage_Core_Block_Abstract->toHtml()
#8 /home/magento/www/magento1420/app/code/core/Mage/Core/Block/Abstract.php(476): Mage_Core_Block_Abstract->_getChildHtml('content', true)
#9 /home/magento/www/magento1420/app/design/frontend/base/default/template/page/2columns-right.phtml(48): Mage_Core_Block_Abstract->getChildHtml('content')
#10 /home/magento/www/magento1420/app/code/core/Mage/Core/Block/Template.php(216): include('/home/magento/w...')
#11 /home/magento/www/magento1420/app/code/core/Mage/Core/Block/Template.php(247): Mage_Core_Block_Template->fetchView('frontend/base/d...')
#12 /home/magento/www/magento1420/app/code/core/Mage/Core/Block/Template.php(261): Mage_Core_Block_Template->renderView()
#13 /home/magento/www/magento1420/app/code/core/Mage/Core/Block/Abstract.php(758): Mage_Core_Block_Template->_toHtml()
#14 /home/magento/www/magento1420/app/code/core/Mage/Core/Model/Layout.php(529): Mage_Core_Block_Abstract->toHtml()
#15 /home/magento/www/magento1420/app/code/core/Mage/Core/Controller/Varien/Action.php(389): Mage_Core_Model_Layout->getOutput()
#16 /home/magento/www/magento1420/app/code/core/Mage/Checkout/controllers/OnepageController.php(224): Mage_Core_Controller_Varien_Action->renderLayout()
#17 /home/magento/www/magento1420/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Checkout_OnepageController->successAction()
#18 /home/magento/www/magento1420/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(253): Mage_Core_Controller_Varien_Action->dispatch('success')
#19 /home/magento/www/magento1420/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#20 /home/magento/www/magento1420/app/code/core/Mage/Core/Model/App.php(304): Mage_Core_Controller_Varien_Front->dispatch()
#21 /home/magento/www/magento1420/app/Mage.php(596): Mage_Core_Model_App->run(Array)
#22 /home/magento/www/magento1420/index.php(80): Mage::run('', 'store')
#23 {main}