ADO.NET Data Service demo consumed in Silverlight application

On this page, I am demonstrating a bug (Known Issue) with Microsoft's recent technology named ADO.NET Data Services (the August 2008 release that came with .NET Framework 3.5 SP1). I came across 2 errors while trying to display some data from 3 joined tables as represented by this schema diagram on a hierarchical datagrid in Silverlight 2.0 using the Expand query from ADO.Net Data Services. The problem is the enumerator value for the System.Data.Servcies.Client.MergeOption. To solve the problem you would need to use the AppendOnly value.