Magento Admin thrown error after applying SUPEE 7405 security patch

Question

When i open admin url, I see this error

Fatal error: Call to a member function getUsername() on a non-object in /app/design/adminhtml/default/default/template/page/header.phtml on line 33 Any ideas?

Answer 1

if you use customer session than add session condition

$session = Mage::getSingleton('customer/session');
if($session->isLoggedIn()) {

}