--- old/src/share/classes/java/util/prefs/Preferences.java	Thu Aug 23 12:29:09 2012
+++ new/src/share/classes/java/util/prefs/Preferences.java	Thu Aug 23 12:29:09 2012
@@ -300,7 +300,8 @@
         }
         try {
             return (PreferencesFactory)
-                Class.forName(platformFactory, false, null).newInstance();
+                Class.forName(platformFactory, false,
+                              Preferences.class.getClassLoader()).newInstance();
         } catch (Exception e) {
             throw new InternalError(
                 "Can't instantiate platform default Preferences factory "