Okay, update. The post, finally posted successfully, is here:
http://www.thespankinglibrary.org/forum/index.php?iframe=1&action=vthread&forum=8&top ic=3448#msg52287I copied what I had written into a plain-text editor (Text Wrangler, on a Mac), to save it for later until I found the problem, and then pasted it back into the text box, one paragraph at a time. The first two paragraphs posted successfully. The third paragraph turned out to be the problem, as it refused to post when I pasted it in in its entirety. Going over it, there were no "special characters", so I made a guess that the forum didn't like the word, "incest". I changed that to "i-n-c-e-s-t". That didn't work. So I changed it to, "(that word that means sex between blood relatives)". Still didn't work. GAH!
My next step was to paste in that third paragraph one sentence at a time. And every sentence posted successfully with no problem. The following paragraphs also went up with no problems.
So I'm at a loss here. I can't figure out what the problem was with the third paragraph.