Warning: array_keys() expects parameter 1 to be array, object given  in /var/www/rockabilia.com/production/releases/20140212054229/app/code/core/Enterprise/Search/Model/Catalog/Layer/Filter/Category.php on line 92

#0 /var/www/rockabilia.com/production/releases/20140212054229/app/code/community/Extendware/EWCore/functions.php(11): mageCoreErrorHandler(2, 'array_keys() ex...', '/var/www/rockab...', 92)
#1 [internal function]: extendwareErrorHandler(2, 'array_keys() ex...', '/var/www/rockab...', 92, Array)
#2 /var/www/rockabilia.com/production/releases/20140212054229/app/code/core/Enterprise/Search/Model/Catalog/Layer/Filter/Category.php(92): array_keys(Object(Rock_BrowseByLetter_Model_Resource_Category_Collection))
#3 /var/www/rockabilia.com/production/releases/20140212054229/app/code/core/Enterprise/Search/Block/Catalog/Layer/Filter/Category.php(52): Enterprise_Search_Model_Catalog_Layer_Filter_Category->addFacetCondition()
#4 /var/www/rockabilia.com/production/releases/20140212054229/app/code/core/Enterprise/Search/Block/Catalogsearch/Layer.php(85): Enterprise_Search_Block_Catalog_Layer_Filter_Category->addFacetCondition()
#5 /var/www/rockabilia.com/production/releases/20140212054229/app/code/core/Mage/Core/Block/Abstract.php(293): Enterprise_Search_Block_Catalogsearch_Layer->_prepareLayout()
#6 /var/www/rockabilia.com/production/shared/var/cache/extendware/ewcore/overrides/Mage/Core/Model/Layout/704f07c63f120e539ed9776cc13b741f.php(456): Mage_Core_Block_Abstract->setLayout(Object(Mage_Core_Model_Layout))
#7 /var/www/rockabilia.com/production/shared/var/cache/extendware/ewcore/overrides/Mage/Core/Model/Layout/704f07c63f120e539ed9776cc13b741f.php(472): Mage_Core_Model_LayoutOverriddenClass->createBlock('enterprise_sear...', 'enterprisesearc...')
#8 /var/www/rockabilia.com/production/shared/var/cache/extendware/ewcore/overrides/Mage/Core/Model/Layout/704f07c63f120e539ed9776cc13b741f.php(239): Mage_Core_Model_LayoutOverriddenClass->addBlock('enterprise_sear...', 'enterprisesearc...')
#9 /var/www/rockabilia.com/production/shared/var/cache/extendware/ewcore/overrides/Mage/Core/Model/Layout/704f07c63f120e539ed9776cc13b741f.php(205): Mage_Core_Model_LayoutOverriddenClass->_generateBlock(Object(Mage_Core_Model_Layout_Element), Object(Mage_Core_Model_Layout_Element))
#10 /var/www/rockabilia.com/production/shared/var/cache/extendware/ewcore/overrides/Mage/Core/Model/Layout/704f07c63f120e539ed9776cc13b741f.php(210): Mage_Core_Model_LayoutOverriddenClass->generateBlocks(Object(Mage_Core_Model_Layout_Element))
#11 /var/www/rockabilia.com/production/releases/20140212054229/app/code/core/Mage/Core/Controller/Varien/Action.php(344): Mage_Core_Model_LayoutOverriddenClass->generateBlocks()
#12 /var/www/rockabilia.com/production/releases/20140212054229/app/code/core/Mage/Core/Controller/Varien/Action.php(269): Mage_Core_Controller_Varien_Action->generateLayoutBlocks()
#13 /var/www/rockabilia.com/production/releases/20140212054229/app/code/core/Mage/CatalogSearch/controllers/ResultController.php(77): Mage_Core_Controller_Varien_Action->loadLayout()
#14 /var/www/rockabilia.com/production/releases/20140212054229/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_CatalogSearch_ResultController->indexAction()
#15 /var/www/rockabilia.com/production/shared/var/cache/extendware/ewcore/overrides/Mage/Core/Controller/Varien/Router/Standard/63563f9ebb198e3182fd11a84369b608.php(250): Mage_Core_Controller_Varien_Action->dispatch('index')
#16 /var/www/rockabilia.com/production/releases/20140212054229/app/code/local/Rock/Maintenance/Controller/Router/Standard.php(46): Mage_Core_Controller_Varien_Router_StandardOverriddenClass->match(Object(Mage_Core_Controller_Request_Http))
#17 /var/www/rockabilia.com/production/releases/20140212054229/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Rock_Maintenance_Controller_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#18 /var/www/rockabilia.com/production/releases/20140212054229/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#19 /var/www/rockabilia.com/production/releases/20140212054229/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#20 /var/www/rockabilia.com/production/releases/20140212054229/index.php(87): Mage::run('base', 'website')
#21 {main}