--- customfilter.export.inc.orig	2009-06-30 01:31:50.000000000 +0200
+++ customfilter.export.inc	2009-07-05 17:43:28.000000000 +0200
@@ -90,7 +90,7 @@
           '#description' => t('Copy the export text and paste it into the import form.'),
           '#cols' => 60,
           '#value' => $export_data,
-          '#rows' => max(40, preg_match_all('/(\r\n?|\n)/', $export_data)),
+          '#rows' => max(40, preg_match_all('/(\r\n?|\n)/', $export_data, $matches)),
         );
       }
       else {