Cannot save the user's profile from the backend-password asked

Hello,

I have a problem not exactly the same as www.joomlapolis.com/forum/146-general/231985-cannot-save-profile-in-backend#274324

From the backend I can modify the profil of members and the Save button works but when I push it, the system ask me the password of the user.

I was using 1.9.1, it was the same, I've just updated to 2.012 today, same problem.
I've checked in CB parameters, I'm super administrator normaly it could be possible for me.

So perhaps I made a mistake but I 'm used to do this operation for a long time without problems.

Someone can help ?

Joomla 3.4.5 stable
CB 2.0.12
PHP 5.6.15

The problem was only about 8% of my usres.
I've modified the password of them and now all is fine.
Subject closed.