validation class and callbacks on private function

[eluser]MadZad[/eluser]
naytro,
I cut-n-paste your code and everything worked fine except for the error message. Looks like you'll need an underscore in the set_message statement:

Code:

$this->validation->set_message('_username_check', 'The %s field can not be the word "test"');

So, as far as I can see, that's the only problem with the code you posted. If that doesn't do the trick, I must give the dreaded "dunno, works on my machine" reply.