New version theme is not working in old version. After upgrading magento or when I design theme in magento 1.5.0.1 and use that theme in magento 1.4.2 that time my product page shows error like Invalid method...

If you install new magento or upgrade your magento with latest version or you got the error like below: Fatal error: Call to undefined method Mage_Adminhtml_Block_Widget::getrowurl() in...