Starting with WordPress 3.1, an administrative bar is included on the public facing side of the site for logged-in users. Unfortunately, I’ve yet to find anyone who finds this desirable.
How to get rid of the gray bar WordPress puts on the top of the screen? Add a simple line to your functions.php file.
add_filter( ‘show_admin_bar’, ‘__return_false’ );
If you do that, all is well in your world.