--- a/jdk/src/share/classes/sun/security/krb5/PrincipalName.java	Wed Apr 10 16:38:26 2013 -0700
+++ b/jdk/src/share/classes/sun/security/krb5/PrincipalName.java	Thu Apr 11 10:58:17 2013 +0800
@@ -499,7 +499,7 @@
     }
 
     public String[] getNameStrings() {
-        return nameStrings;
+        return nameStrings.clone();
     }
 
     public byte[][] toByteArray() {