1) Launch the PMAdmin site and navigate to: General Settings | Search and Logon Options;
2) Scroll down to the section: 'Security Settings';
3) Make sure the 'Show a security image every time the search is performed' checkbox is selected;
4) Click 'Save'.
A fix for this Product Defect 270052 has been made available via a future hotfix and will be part of all future releases of the Product.