Thanks — in my case the link never gets posted at all. When I try to submit, I immediately get a ‘can’t submit this link’ message (not a dead post). So it fails before appearing anywhere in my profile. That’s why I was wondering if this is just a new-account restriction or something similar.

That makes sense from the moderators’ perspective. In any case, I was able to submit just a little while ago, so it seems to be resolved. Thanks for the explanation.