Index: wordpress-importer.php
===================================================================
--- wordpress-importer.php	(revision 658085)
+++ wordpress-importer.php	(working copy)
@@ -800,8 +800,66 @@
 			'menu-item-xfn' => $_menu_item_xfn,
 			'menu-item-status' => $item['status']
 		);
-
-		$id = wp_update_nav_menu_item( $menu_id, 0, $args );
+		
+		// Attempt to find existing nav-item
+		$menu_item_db_id = (int) $item['post_id'];
+		$original_object = get_post( $menu_item_db_id );
+		
+		// Not found, so create with original ID
+		if ( is_null( $original_object ) )  {
+		
+			// Logic reused from line 552 of this file (@ version 0.6)
+			$post_parent = (int) $item['post_parent'];
+			if ( $post_parent ) {
+				// if we already know the parent, map it to the new local ID
+				if ( isset( $this->processed_posts[$post_parent] ) ) {
+					$post_parent = $this->processed_posts[$post_parent];
+				// otherwise record the parent for later
+				} else {
+					$this->post_orphans[intval($post['post_id'])] = $post_parent;
+					$post_parent = 0;
+				}
+			}
+		
+			// map the post author
+			$author = sanitize_user( $item['post_author'], true );
+			if ( isset( $this->author_mapping[$author] ) )
+				$author = $this->author_mapping[$author];
+			else
+				$author = (int) get_current_user_id();
+		
+			$postdata = array(
+				'import_id' => $item['post_id'],
+				'post_author' => $author,
+				'post_date' => $item['post_date'],
+				'post_date_gmt' => $item['post_date_gmt'],
+				'post_content' => $item['post_content'],
+				'post_excerpt' => $item['post_excerpt'],
+				'post_title' => $item['post_title'],
+				'post_status' => $item['status'],
+				'post_name' => $item['post_name'],
+				'comment_status' => $item['comment_status'],
+				'ping_status' => $item['ping_status'],
+				'guid' => $item['guid'],
+				'post_parent' => $post_parent,
+				'menu_order' => $item['menu_order'],
+				'post_type' => $item['post_type'],
+				'post_password' => $item['post_password']
+			);
+			$menu_item_db_id = wp_insert_post( $postdata, true );
+		
+			if ( is_wp_error( $menu_item_db_id ) ) {
+				$post_type_object = get_post_type_object( $item['post_type'] );
+				printf( __( 'Failed to import %s “%s”', 'wordpress-importer' ),
+					$post_type_object->labels->singular_name, esc_html($item['post_title']) );
+				if ( defined('IMPORT_DEBUG') && IMPORT_DEBUG )
+					echo ': ' . $post_id->get_error_message();
+				echo '<br />';
+			}
+		}
+		
+		$id = wp_update_nav_menu_item( $menu_id, $menu_item_db_id, $args );
+		
 		if ( $id && ! is_wp_error( $id ) )
 			$this->processed_menu_items[intval($item['post_id'])] = (int) $id;
 	}