cvs diff -u -p image.admin.inc 
Index: image.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/image/image.admin.inc,v
retrieving revision 1.28
diff -u -p -r1.28 image.admin.inc
--- image.admin.inc	21 Nov 2010 07:24:53 -0000	1.28
+++ image.admin.inc	21 Feb 2011 09:19:31 -0000
@@ -227,7 +227,7 @@ function image_style_form_submit($form, 
 
   image_style_save($style);
   if ($form_state['values']['op'] == t('Update style')) {
-    drupal_set_message('Changes to the style have been saved.');
+    drupal_set_message(t('Changes to the style have been saved.'));
   }
   $form_state['redirect'] = 'admin/config/media/image-styles/edit/' . $style['name'];
 }