The following error is throun on Catalog > Manage products in Magento backend after Magento upgrade or SUPEE-8788 installation:
Fatal error: Call to undefined function lcfirst() in app/code/core/Mage/Uploader/Model/Config/Abstract.php on line 50
Fatal error: Call to undefined function lcfirst() in includes/src/Mage_Uploader_Model_Config_Abstract.php on line 50
lcfirst function is missing in your PHP version. It can happen if your PHP version is older than 5.3.
Request your host to switch PHP version from PHP 5.2 up to PHP 5.3.
Posted in: Fatal errors