Index: modules/system/system.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.admin.inc,v
retrieving revision 1.301
diff -u -p -r1.301 system.admin.inc
--- modules/system/system.admin.inc	5 Sep 2010 15:38:16 -0000	1.301
+++ modules/system/system.admin.inc	9 Sep 2010 00:33:36 -0000
@@ -2875,6 +2875,7 @@ function system_configure_date_formats_f
   $form['date_format'] = array(
     '#type' => 'textfield',
     '#title' => t('Format string'),
+    '#maxlength' => 100,
     '#description' => t('A user-defined date format. See the <a href="@url">PHP manual</a> for available options.', array('@url' => 'http://php.net/manual/function.date.php')),
     '#default_value' => ($dfid ? $format->format : ''),
     '#field_suffix' => ' <small id="edit-date-format-suffix">' . $now . '</small>',