Even though Tip 70 is not released from the holding cell, I created tip 71 and removed the URL footnotes to see if that was the problem, add text as a comment, went to add tags by editing the main post, and got this:
Now the post itself has disappeared. Vanilla seems determined to kill Tip of the Day - it is even using subversive tactics.
It also closes this message box when I get to the paren of @Jason Stone (Logos) at the front of the post.