--- upload_replace.module.before	2012-09-10 10:12:21.000000000 -0500
+++ upload_replace.module	2012-09-20 08:23:08.000000000 -0500
@@ -17,7 +17,7 @@
  * Implementation of hook_file_update()
  */
 function upload_replace_file_update(&$new_file) {
-  if (!$new_file->fid) {
+  if (empty($new_file->fid)) {
     //Nothing to do if no fileid
     return;
   }
@@ -146,6 +146,6 @@
  * HOOK_file_delete, update the filepath in the file object before deleting as we may have altered it above
  * @param object $new_file
  */
-function upload_replace_file_delete(&$file) {
+function upload_replace_file_delete($file) {
   $file->filepath = db_result(db_query("SELECT filepath FROM {files} WHERE fid = %d", $file->fid));
 }