In fact there's nothing to stop you creating a puzzle with no 9 letter word recognised by Chihuahua. (There will be a warning message.)
As someone who also reads the Melbourne Age, and usually has a look at the Target puzzle, I think this is the first time Chi and the newspaper have had the same 9 letter word at the same time. However it's not the same puzzle, as the mandatory letter in the Age is D, not U.