[plugin: theme_my_login] user's password unveiled in the e-mail field

I’ve checked the option “Private Site” (Require users to be logged in to view site) so when a user try to access the site it is redirected to login page.

If the user has previously saved the password in Chrome browser, the password itself is showed in E-mail field for a fraction of second (but you can read it!).

It is horrible. Everyone can see the user’s password!

It happen only to me? How can i fix it?