Index: src/wp-admin/admin-footer.php
===================================================================
--- src/wp-admin/admin-footer.php	(revision 31715)
+++ src/wp-admin/admin-footer.php	(working copy)
@@ -15,7 +15,7 @@
 <div class="clear"></div></div><!-- wpbody -->
 <div class="clear"></div></div><!-- wpcontent -->
 
-<div id="wpfooter">
+<div id="wpfooter" role="contentinfo">
 	<?php
 	/**
 	 * Fires after the opening tag for the admin footer.
Index: src/wp-admin/admin-header.php
===================================================================
--- src/wp-admin/admin-header.php	(revision 31715)
+++ src/wp-admin/admin-header.php	(working copy)
@@ -190,7 +190,6 @@
 ?>
 
 <div id="wpwrap">
-<a tabindex="1" href="#wpbody-content" class="screen-reader-shortcut"><?php _e('Skip to main content'); ?></a>
 <?php require(ABSPATH . 'wp-admin/menu-header.php'); ?>
 <div id="wpcontent">
 
@@ -203,7 +202,7 @@
 do_action( 'in_admin_header' );
 ?>
 
-<div id="wpbody">
+<div id="wpbody" role="main">
 <?php
 unset($title_class, $blog_name, $total_update_count, $update_title);
 
Index: src/wp-admin/menu-header.php
===================================================================
--- src/wp-admin/menu-header.php	(revision 31715)
+++ src/wp-admin/menu-header.php	(working copy)
@@ -219,9 +219,14 @@
 
 ?>
 
+<div id="adminmenumain" role="navigation" aria-label="<?php esc_attr_e( 'Main menu' ); ?>">
+<a href="#wpbody-content" class="screen-reader-shortcut"><?php _e( 'Skip to main content' ); ?></a>
+<?php if ( is_admin() ) { ?>
+	<a href="#wp-toolbar" class="screen-reader-shortcut"><?php _e( 'Skip to toolbar' ); ?></a>
+<?php } ?>
 <div id="adminmenuback"></div>
 <div id="adminmenuwrap">
-<ul id="adminmenu" role="navigation">
+<ul id="adminmenu">
 
 <?php
 
@@ -236,3 +241,4 @@
 ?>
 </ul>
 </div>
+</div>
Index: src/wp-includes/class-wp-admin-bar.php
===================================================================
--- src/wp-includes/class-wp-admin-bar.php	(revision 31715)
+++ src/wp-includes/class-wp-admin-bar.php	(working copy)
@@ -363,9 +363,11 @@
 		}
 
 		?>
-		<div id="wpadminbar" class="<?php echo $class; ?>" role="navigation">
-			<a class="screen-reader-shortcut" href="#wp-toolbar" tabindex="1"><?php _e('Skip to toolbar'); ?></a>
-			<div class="quicklinks" id="wp-toolbar" role="navigation" aria-label="<?php esc_attr_e('Top navigation toolbar.'); ?>" tabindex="0">
+		<div id="wpadminbar" class="<?php echo $class; ?>">
+			<?php if ( ! is_admin() ) { ?>
+				<a class="screen-reader-shortcut" href="#wp-toolbar" tabindex="1"><?php _e( 'Skip to toolbar' ); ?></a>
+			<?php } ?>
+			<div class="quicklinks" id="wp-toolbar" role="navigation" aria-label="<?php esc_attr_e( 'Toolbar' ); ?>" tabindex="0">
 				<?php foreach ( $root->children as $group ) {
 					$this->_render_group( $group );
 				} ?>