I am trying to edit a post to improve it, but cannot:
I am editing posts a lot and I know the message well. But this time it is
That's new. I have tried multiple times. Edited just tags or just the body or the title. It blocks all the time. First observed around 15 minutes ago.
It may be relevant that in my first attempt to edit I changed the title to start with an upper case letter and then got an error message in yellow / brown ranting about the (now?) duplicate title. All further attempts were blocked as described.