Ghosts of Passwords Past

I had to log into my Gmail account from a sketchy Internet cafe computer in Buenos Aires a few weeks ago to check on a reservation.  Since I generally don't like doing that I made it a point to change my password when I got to the hotel.

Tonight I went on autopilot and tried logging in with the old password, and was pleasantly surprised to see this custom error message:

Very cool attention to detail that both subtly reminds you of the change and/or alerts you to a possible issue.