Index: wp-includes/class-wp-xmlrpc-server.php
===================================================================
--- wp-includes/class-wp-xmlrpc-server.php	(revision 22135)
+++ wp-includes/class-wp-xmlrpc-server.php	(working copy)
@@ -836,7 +836,8 @@
 			'wp_author_display_name' => $author->display_name,
 			'date_created_gmt'       => $page_date_gmt,
 			'custom_fields'          => $this->get_custom_fields( $page->ID ),
-			'wp_page_template'       => $page_template
+			'wp_page_template'       => $page_template,
+			'wp_page_thumbnail'      => get_post_thumbnail_id( $page->ID )
 		);
 
 		return apply_filters( 'xmlrpc_prepare_page', $_page, $page );