OK, I had left Internet Explorer and gone to Firefox a while back. It worked out ok, except that I still can't ever comment on blogs with "embedded below" style comment boxes. I had searched around a bit and found other bloggers complaining about the same issue. Several people recommended a switch to Google Chrome might solve the problem.
So yesterday I switched to Google Chrome.
I tried again this morning to comment on an "embedded below" style comment box and ....nothing.