Location of “Login error message”

Hi,

I just upgraded to 2.1.3 and everything went smoothly, except my translated login error messages no longer worked.

I’ve searching high and low and don’t know where is these two error messages and I suspect they are both hardcoded somewhere else other than in wp-login.php.

These are the two error messages:

ERROR: Incorrect password.

ERROR: Invalid username.

Can anyone please help?

Thanks in advance!