Now the login form have two steps - at first step I need to fill login, then press "Next" button (for what?), fill my password, press "Log in".
This type of login form brings problems with auto-filling credentials by most of browser plugins.
Please remove the surplus useless step with pressing "Next" in login form, to allow fill login and password in one page, using "Tab" button (or auto-fill plugin), like in most of other websites.