Index: modules/system/system.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.admin.inc,v
retrieving revision 1.35
diff -u -p -r1.35 system.admin.inc
--- modules/system/system.admin.inc	8 Dec 2007 14:06:22 -0000	1.35
+++ modules/system/system.admin.inc	8 Dec 2007 21:27:53 -0000
@@ -1911,7 +1911,7 @@ function theme_system_modules($form) {
 
   // Individual table headers.
   $header = array();
-  $header[] = array('data' => t('Enabled'), 'class' => 'checkbox');
+  $header[] = array('data' => t('Enabled'));
   if (module_exists('throttle')) {
     $header[] = array('data' => t('Throttle'), 'class' => 'checkbox');
   }