Index: modules/file/file.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/file/file.module,v
retrieving revision 1.16
diff -u -r1.16 file.module
--- modules/file/file.module	3 Jan 2010 22:01:46 -0000	1.16
+++ modules/file/file.module	6 Jan 2010 03:58:25 -0000
@@ -366,6 +366,7 @@
     '#value' => t('Upload'),
     '#validate' => array(),
     '#submit' => array('file_managed_file_submit'),
+    '#limit_validation_errors' => array($element['#parents']),
     '#ajax' => $ajax_settings,
     '#weight' => -5,
   );
@@ -379,6 +380,7 @@
     '#value' => t('Remove'),
     '#validate' => array(),
     '#submit' => array('file_managed_file_submit'),
+    '#limit_validation_errors' => array($element['#parents']),
     '#ajax' => $ajax_settings,
     '#weight' => -5,
   );