Index: modules/system/system.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.module,v
retrieving revision 1.922
diff -u -r1.922 system.module
--- modules/system/system.module	22 Apr 2010 07:36:50 -0000	1.922
+++ modules/system/system.module	23 Apr 2010 09:02:46 -0000
@@ -2313,8 +2313,8 @@
   // Set defaults for theme info.
   $defaults = array(
     'regions' => array(
-      'sidebar_first' => 'Left sidebar',
-      'sidebar_second' => 'Right sidebar',
+      'sidebar_first' => 'Sidebar first',
+      'sidebar_second' => 'Sidebar second',
       'content' => 'Content',
       'header' => 'Header',
       'footer' => 'Footer',