Warning: SimpleXMLElement::xpath(): Invalid expression  in /home/www/magento-1.4/app/code/local/Nexcessnet/Turpentine/Model/Observer/Esi.php on line 414

#0 [internal function]: mageCoreErrorHandler(2, 'SimpleXMLElemen...', '/home/www/magen...', 414, Array)
#1 /home/www/magento-1.4/app/code/local/Nexcessnet/Turpentine/Model/Observer/Esi.php(414): SimpleXMLElement->xpath('//contacts_%20_...')
#2 /home/www/magento-1.4/app/code/local/Nexcessnet/Turpentine/Model/Observer/Esi.php(327): Nexcessnet_Turpentine_Model_Observer_Esi->_getBlockLayoutHandles(Object(Girodmedical_Cart_Block_View))
#3 /home/www/magento-1.4/app/code/local/Nexcessnet/Turpentine/Model/Observer/Esi.php(273): Nexcessnet_Turpentine_Model_Observer_Esi->_getEsiData(Object(Girodmedical_Cart_Block_View), Array)
#4 /home/www/magento-1.4/app/code/local/Mage/Core/Model/App.php(1166): Nexcessnet_Turpentine_Model_Observer_Esi->injectEsi(Object(Varien_Event_Observer))
#5 /home/www/magento-1.4/app/code/local/Mage/Core/Model/App.php(1148): Mage_Core_Model_App->_callObserverMethod(Object(Nexcessnet_Turpentine_Model_Observer_Esi), 'injectEsi', Object(Varien_Event_Observer))
#6 /home/www/magento-1.4/app/Mage.php(416): Mage_Core_Model_App->dispatchEvent('core_block_abst...', Array)
#7 /home/www/magento-1.4/app/code/core/Mage/Core/Block/Abstract.php(740): Mage::dispatchEvent('core_block_abst...', Array)
#8 /home/www/magento-1.4/app/code/core/Mage/Core/Block/Abstract.php(551): Mage_Core_Block_Abstract->toHtml()
#9 /home/www/magento-1.4/app/design/frontend/default/girodmedical/template/page/html/header.phtml(112): Mage_Core_Block_Abstract->getBlockHtml('header_cart_box')
#10 /home/www/magento-1.4/app/code/core/Mage/Core/Block/Template.php(212): include('/home/www/magen...')
#11 /home/www/magento-1.4/app/code/core/Mage/Core/Block/Template.php(239): Mage_Core_Block_Template->fetchView('frontend/defaul...')
#12 /home/www/magento-1.4/app/code/core/Mage/Core/Block/Template.php(253): Mage_Core_Block_Template->renderView()
#13 /home/www/magento-1.4/app/code/core/Mage/Core/Block/Abstract.php(753): Mage_Core_Block_Template->_toHtml()
#14 /home/www/magento-1.4/app/code/core/Mage/Core/Block/Abstract.php(520): Mage_Core_Block_Abstract->toHtml()
#15 /home/www/magento-1.4/app/code/core/Mage/Core/Block/Abstract.php(471): Mage_Core_Block_Abstract->_getChildHtml('header', true)
#16 /home/www/magento-1.4/app/design/frontend/default/girodmedical/template/page/1column.phtml(43): Mage_Core_Block_Abstract->getChildHtml('header')
#17 /home/www/magento-1.4/app/code/core/Mage/Core/Block/Template.php(212): include('/home/www/magen...')
#18 /home/www/magento-1.4/app/code/core/Mage/Core/Block/Template.php(239): Mage_Core_Block_Template->fetchView('frontend/defaul...')
#19 /home/www/magento-1.4/app/code/core/Mage/Core/Block/Template.php(253): Mage_Core_Block_Template->renderView()
#20 /home/www/magento-1.4/app/code/core/Mage/Core/Block/Abstract.php(753): Mage_Core_Block_Template->_toHtml()
#21 /home/www/magento-1.4/app/code/core/Mage/Core/Model/Layout.php(529): Mage_Core_Block_Abstract->toHtml()
#22 /home/www/magento-1.4/app/code/local/Mage/Core/Controller/Varien/Action.php(389): Mage_Core_Model_Layout->getOutput()
#23 /home/www/magento-1.4/app/code/local/Mage/Cms/Helper/Page.php(143): Mage_Core_Controller_Varien_Action->renderLayout()
#24 /home/www/magento-1.4/app/code/local/Mage/Cms/Helper/Page.php(51): Mage_Cms_Helper_Page->_renderPage(Object(Mage_Cms_IndexController), 'no-route')
#25 /home/www/magento-1.4/app/code/core/Mage/Cms/controllers/IndexController.php(77): Mage_Cms_Helper_Page->renderPage(Object(Mage_Cms_IndexController), 'no-route')
#26 /home/www/magento-1.4/app/code/local/Mage/Core/Controller/Varien/Action.php(418): Mage_Cms_IndexController->noRouteAction()
#27 /home/www/magento-1.4/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('noRoute')
#28 /home/www/magento-1.4/app/code/core/Mage/Core/Controller/Varien/Front.php(184): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#29 /home/www/magento-1.4/app/code/local/Mage/Core/Model/App.php(298): Mage_Core_Controller_Varien_Front->dispatch()
#30 /home/www/magento-1.4/app/Mage.php(596): Mage_Core_Model_App->run(Array)
#31 /home/www/magento-1.4/index.php(109): Mage::run('fr_fr', 'store')
#32 {main}