Index: includes/install.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/install.inc,v
retrieving revision 1.121
diff -u -p -r1.121 install.inc
--- includes/install.inc	4 Jan 2010 21:31:52 -0000	1.121
+++ includes/install.inc	8 Jan 2010 10:55:51 -0000
@@ -946,6 +946,8 @@ function st($string, $args = array()) {
         $file = (object) array('uri' => $filename);
         _locale_import_read_po('mem-store', $file);
         $locale_strings = _locale_import_one_string('mem-report');
+        // Select default context.
+        $locale_strings = $locale_strings[''];
       }
     }
   }