No there are no news.
But i remember a customer who have had similar problems (see http://social.msdn.microsoft.c…d7-4913-8769-eb3ff9d792b5). Does code optimization helps in your case?
Can you send me a configured NetDCU11, source code and a short instruction for investigation? Problem have to be reproducable in my office! I cannot promise you a solution but i can spend one or two hours, then we will see ... .