In the version of DrRacket in HEAD, when I press the two characters "[" "]" in sequence in the Definitions pane, I visually see that the paren fixing is happening on the "]" in a very distracting way: it visually switches between "]", "}", and finally ")".
I don't see this behavior on the Interactions pane. _________________________ Racket Developers list: http://lists.racket-lang.org/dev