My e-mail to Bitcointalk:  "The login Captcha won't show up, despite me enabling JS permissions for Bitcointalk, Google, and Gstatic.  I was hoping to update my sales listing with photos.  If for some reason this is a permanent issue, could a moderator help by posting the photos?"

Bitcointalk's reply:  "This is the hacked/lost accounts recovery email. Such requests should be made in the relevant Bitcointalk forum section."

So, I'm supposed to post to the forum, to inform them that I cannot log in... to post to the forum.  *facepalm*

Luckily, the problem turned out to be an issue with Firefox's privacy settings.