Index: wp-includes/post-template.php
===================================================================
--- wp-includes/post-template.php	(revision 11263)
+++ wp-includes/post-template.php	(working copy)
@@ -199,7 +199,9 @@
 	else
 		$file = $pagenow; //$_SERVER['PHP_SELF'];
 
-	if ( $page > count($pages) ) // if the requested page doesn't exist
+	if ( !$multipage )
+		$page = 1;
+	elseif ( $page > count($pages) ) // if the requested page doesn't exist
 		$page = count($pages); // give them the highest numbered page that DOES exist
 
 	$content = $pages[$page-1];