[arch-general] Cannot post to Forums - Bad HTTP_REFERER??

All, Attempting to post details to https://bbs.archlinux.org/viewtopic.php?id=224028 from FF 45.8esr, I get: Bad HTTP_REFERER. You were referred to this page from an unauthorized source. If the problem persists please make sure that 'Base URL' is correctly set in Admin/Options and that you are visiting the forum by navigating to that URL. More information regarding the referrer check can be found in the FluxBB documentation. I've never had problems before, but haven't posted in months, what to try? -- David C. Rankin, J.D.,P.E.