Feedback on incorrect password is not clear enough

[aolieman]

I've set a password for my account. At first, there was no problem confirming the password.

A couple of days later I am not able to confirm entering the password anywhere. I came across this when wanting to set the inflation destination. It asks me to sign using my password, but after entering it the "OK" button stays greyed out. The same happens when I try to disable the password.

EDIT: This happened because I was making a typo in the password. I now understand that the OK button only becomes active when the correct password is entered. I would prefer more explicit feedback when I've not entered the correct password and try to press the button anyway.