upgrade from 2.2.6 to 2.2.11 breaks .NET client

[Kurt]

I was unable to find a post regarding the issue, so I thought I'd give a 
heads-up.

I recently upgraded from 2.2.6 to 2.2.11 and my C# client stopped 
working.  Objects received from my JAXP service weren't being 
de-serialized anymore.  The XML looked fine, but the .NET libs were 
choking on something.  I could send data but any object I tried to fetch 
returned null on the C# side of things.  Reverting to 2.2.6 fixed the 
problem.

Hope this helps someone.