RequestFactory - Intermittent "The AutoBean has been frozen" on newly created

I'm running the Request Factory client code below. The first time I invoke it, I receive an IllegalStateException: The AutoBean has been frozen.
Subsequent invocations work just fine.

The odd thing is, the object is created whether I get the exception or not.

If I do get the exception, none of the receiver callbacks get fired.

We're running GWT 2.4.0 on GAE 1.6.1.


        GroupDealService ctx = requestFactory.groupDealService();
        GroupDealProxy gdp = ctx.create(GroupDealProxy.class);
       
        ctx.edit(gdp);
       
        gdp.setName("Foo");
       
        ctx.addOrUpdate(gdp).fire(
            new Receiver<GroupDealProxy>() {
                @Override
                public void onSuccess(GroupDealProxy groupDeal) {
                    Log.info("GroupDealEditActivity.activate.onSuccess");
                    placeController.goTo(new GroupDealIndexPlace());
                }

                @Override
                public void onFailure(ServerFailure error) {
                    Log.info("GroupDealEditActivity.activate.onFailure" + error.getMessage());
                    super.onFailure(error);
                }
            }
        );

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