Index: class-wp-admin-bar.php
===================================================================
--- class-wp-admin-bar.php	(revision 25549)
+++ class-wp-admin-bar.php	(working copy)
@@ -46,7 +46,9 @@
 		add_action( 'admin_head', 'wp_admin_bar_header' );
 
 		if ( current_theme_supports( 'admin-bar' ) ) {
-			$admin_bar_args = get_theme_support( 'admin-bar' ); // add_theme_support( 'admin-bar', array( 'callback' => '__return_false') );
+			// To hide the admin bar for logged-in users, use the following code:
+			// add_theme_support( 'admin-bar', array( 'callback' => '__return_false') );
+			$admin_bar_args = get_theme_support( 'admin-bar' ); 
 			$header_callback = $admin_bar_args[0]['callback'];
 		}