Ticket #16746: 16746.2.patch

wp-includes/query.php

@@ -3647 +3647 @@
         if ( is_single() || is_page() || is_feed() )
                 $more = 1;
         $content = $post->post_content;
-        if ( strpos( $content, '<!--nextpage-->' ) ) {
+        if ( false !== strpos( $content, '<!--nextpage-->' ) ) {
                 if ( $page > 1 )
                         $more = 1;
                 $multipage = 1;
                 $content = str_replace("\n<!--nextpage-->\n", '<!--nextpage-->', $content);
                 $content = str_replace("\n<!--nextpage-->", '<!--nextpage-->', $content);
                 $content = str_replace("<!--nextpage-->\n", '<!--nextpage-->', $content);
+                // Ignore the nextpage tag at the beginning of content
+                if ( 0 === strpos( $content, '<!--nextpage-->' ) )
+                        $content = substr( $content, 15 );
                 $pages = explode('<!--nextpage-->', $content);
                 $numpages = count($pages);
         } else {