Profile Option PJB_NO_INV_APPR_WF Doesn't Appear to Work

Summary:

Per this documentation below you can skip the Contract Invoice Approval Workflow by setting the above profile option. Has anyone been able to successfully get this to work? I've set the profile option at the site but all of my contract invoices still require either someone to click the "Approve" button before they can click "Release".

Thanks,

Lee