Wrong error message after correcting an error in username

[wimfeijen]

After entering an illegal username (fe. "Wim (wim@…)"), WordPress gives an error message saying:
"ERROR: This username is invalid because it uses illegal characters. Please enter a valid username."
So far so good.

Now, when I correct the issue and click "Add new user" again, the above error message remains in the screen, while the illegal characters are no longer there and the actual error I am facing is that I forgot my password. Which is confusing for me.

The same occurs, when I enter an e-mail which has already been registered. I get the error message:
"ERROR: This email is already registered, please choose another one."
When I correct, the error message remains, while this particular problem has been solved.

WP v: 3.3
Browser: Google Chrome 14.0 on Ubuntu 11.10

I believe that this is currently expected behavior, clunky as it may be.

If I'm grasping this correctly, a $_POST error (generated via server-side validation) will persist as long as long as one of the four required inputs (user_login, email, pass1 or pass2) is empty. This is because the asynch validation prevents the form from updating the $_POST data until they all hold some kind of value regardless of integrity. E.g., ajax checks for a value, server checks for integrity of the value.

So unless somebody wants to tackle asynchronous server-side $_POST validation, I suggest closing as wontfix or maybelater.

Marking this maybelater as I concur with @DrewAPicture that we would need to tackle async server-side validation or find another work around.

A workaround might be to hide div.error along with adding form-invalid class in wpAjax.invalidateForm() when trying to submit an incomplete form.