You will see it in the following configuration: At Ease 5.0.2 and Mac OS 8.5 - 8.6, Restricted Finder workgroups with At Ease set to allow specified printers. The printers are crossed out when At Ease moves a desktop printer to the "Secured Desktop Printers" folder. Depending on the pattern of usage on a particular workstation, the behavior can seem erratic and random.
Either of the following steps will work around the issue by preventing At Ease from moving the desktop printer to the Secured Items folder: