Index: extensions/upload_form/upload.php
===================================================================
--- extensions/upload_form/upload.php	(revision 4740)
+++ extensions/upload_form/upload.php	(revision 4783)
@@ -51,6 +51,6 @@
     {
       $source_filepath = $_FILES['image_upload']['tmp_name'][$idx];
-      $name = $_FILES['image_upload']['name'][$idx];
-      add_uploaded_file($source_filepath, $name, array($_POST['category']));
+      $original_filename = $_FILES['image_upload']['name'][$idx];
+      add_uploaded_file($source_filepath, $original_filename, array($_POST['category']));
     }
   }