Whilst debugging why OAuth was not working for my application (it turns out, even if you override the callback_url, you need to provide one otherwise twitter seems to default to the PIN method) - I figured I’d delete my application.
Now, the application does not exist anymore but twitter says “Name already taken.”
Which is a shame, as had I know I would have gone with a random name rather than the actual app. name I was intending to use whilst developing.
Are the names of deleted application permanently removed from the list of available application names?