In the post at http://www.chatbots.org/ai_zone/viewreply/5882, I noticed that Erwin had a minor typo in his post that ended up running two URL links together, so I decided to correct the problem. However, both the Preview and Submit buttons take me to the 404 page. When I edit Jan Bogaerts’ post, directly above it, the Preview and Submit buttons work correctly.
Though the symptopms are similar to Arthur’s post at http://www.chatbots.org/admin/viewthread/545/, the circumstances under which I got the 404 page are different, thus the new post.