If the NIM "Obtain new credentials" dialog is displayed in the mode for 
changing the password (because it's expired), the "OK" button is grayed 
out... even after filling in the "Current Password", "New Password" and 
"New Password again" fields.  Pressing "Enter" doesn't do anything.

This means even though there are fields to change the password, there's no 
way to get the dialog to accept the change.