Signing-in while picture is loading looses focus
This situation occurs after you access the sign-in page. In the first seconds, the main picture is loading. During that time, the user can type his user name and password.
If the user is typing is password and, at the same time, the picture finishes loading, the focus go back to the user name field ! Then, the remaining part of the password is written in the user name field and can be read by anybody in front of the screen !