Index: class-wp-admin-bar.php
===================================================================
--- class-wp-admin-bar.php	(revision 10)
+++ class-wp-admin-bar.php	(working copy)
@@ -113,8 +113,13 @@
 
 	/* Helpers */
 	function recursive_render( $id, &$menu_item ) { ?>
-		<?php $menuclass = ( ! empty( $menu_item['children'] ) ) ? 'menupop ' : ''; ?>
+		<?php
+		if( null == $menu_item )
+			return;
 
+		$menuclass = ( ! empty( $menu_item['children'] ) ) ? 'menupop ' : '';
+		?>
+
 		<li class="<?php echo $menuclass . "ab-$id" ?><?php
 			if ( ! empty( $menu_item['meta']['class'] ) ) :
 				echo ' ' . $menu_item['meta']['class'];
@@ -192,7 +197,7 @@
 	function remove_node( $id, &$menu ) {
 		foreach( $menu as $menu_item_id => &$menu_item ) {
 			if ( $menu_item_id == $id ) {
-				$menu_item = null;
+				unset( $menu_item );
 				return true;
 			}