With the Magento Patches 7405 and 7616, we noticed an error when trying to view the orders in the admin. The order page is blank.

admin->sales->order->view order

To resolve this issue, go to /app/code/core/Mage/Adminhtml/Helper/Sales.php

and find the code around line 124 that says  $links = [];  and change it to $links = array();

Now the orders will display.