#Emacs has started to do something a bit odd today (OK, I know, no jokes about the oddity of Emacs please).
When Emacs is running in a desktop window and I press C-x C-f to visit a file (proper grown-up Emacs terminology, right?), I get what is in the first image. As soon as I start typing, or start choosing an option it all goes back to normal (second image).
If Emacs is full screen, everything acts normally.
What might be going on here?

