protected function addCustomColumns(Mage_Adminhtml_Block_Catalog_Product_Grid $grid) { $store = Mage::app()->getStore((int) $grid->getRequest()->getParam('store', 0)); $grid->addColumnAfter('updated_at', array('header' => Mage::helper('magelog_grid')->__('Updated at'), 'width' => '150px', 'type' => 'datetime', 'index' => 'updated_at'), 'name'); }