diff -r 8c0b6bccfe47 -r 0989ad8c0860 src/share/jaxws_classes/com/sun/tools/internal/ws/util/ForkEntityResolver.java
--- a/src/share/jaxws_classes/com/sun/tools/internal/ws/util/ForkEntityResolver.java	Thu Apr 04 19:05:24 2013 -0700
+++ b/src/share/jaxws_classes/com/sun/tools/internal/ws/util/ForkEntityResolver.java	Tue Apr 09 14:51:13 2013 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -49,6 +49,12 @@
         InputSource is = lhs.resolveEntity(publicId, systemId);
         if(is!=null)
             return is;
+
+        if(publicId == null) {
+          // WorkAround: Ant's XMLCatalog supports public IDs only, this allows us to treat it as system IDs
+          publicId = systemId;
+        }
+
         return rhs.resolveEntity(publicId, systemId);
     }
 }