--- filefield_paths/filefield_paths.module	2010-01-11 01:07:16.000000000 -0500
+++ filefield_paths.module	2010-02-25 15:30:58.000000000 -0500
@@ -518,6 +518,8 @@
  * Implements hook_filefield_paths_process_file().
  */
 function filefield_paths_filefield_paths_process_file($new, &$file, $settings, &$node, &$update) {
+  if (!$file['field']['filename']) return;
+  
   if ($new) {
     // Process filename
     $file['filename']['old'] = $file['field']['filename'];