I replied in the other thread.
It appears you grabbed the URL before changing the privacy settings, which means the URL is no longer valid.
Dang it. I really don't want those made public on Flickr.
Also, I switched my SD-45 drawing picture back to private after I posted it, and it still shows up. Why are these 3 specifically not showing up?
You don't have to set them to public. You just have to use the new URL that was generated after you changed the privacy settings.
Except that when I press the share button when it is private, I only get options for "email" and "share". When I press the share button when it is public, I then also get the option for BBCode. As a result, I temporarily turned it public, got the BBCode deal, posted it, then turned it private again.
EDIT: also I didn't see your post on the other thread until just now, and the steps seem a lot clearer there, however, the issue still remains: Flickr doesn't let me use BBCode if it's set to private.