commit d058db1120afe923e2f3ce79e4bce99fcf9f76ae
Author: Joel Pittet <joel@pittet.ca>
Date:   Fri May 2 12:16:14 2014 -0700

    change out character to avoid screen readers from reading...

diff --git a/core/modules/system/css/system.theme.css b/core/modules/system/css/system.theme.css
index c809135..9bd5e9f 100644
--- a/core/modules/system/css/system.theme.css
+++ b/core/modules/system/css/system.theme.css
@@ -85,7 +85,9 @@ h4.label {
 
 .form-required:after {
   color: #e00;
-  content: " * ";
+  content: " \204E ";
+  line-height: 1;
+  vertical-align: super;
   speak: none;
 }