Index: javax/jdo/spi/I18NHelper.java
===================================================================
--- javax/jdo/spi/I18NHelper.java	(revision 292643)
+++ javax/jdo/spi/I18NHelper.java	(working copy)
@@ -236,7 +236,12 @@
 
         if (messages == null) //not found as loaded - add
         {
-            messages = ResourceBundle.getBundle(bundleName, locale, loader);
+            if (loader != null) {
+                messages = ResourceBundle.getBundle(bundleName, locale, loader);
+            } else {
+                // the JDO library is loaded by the boostrap class loader
+                messages = ResourceBundle.getBundle(bundleName, locale);
+            }
             bundles.put(bundleName, messages);
         }
         return messages;