Deploying WCF RIA Services Redux

Installed Visual Studio 2010 SP1, Silverlight WCF RIA Services v1.0 SP1, but when I deployed it on the server, was getting the following error:

Operation named '[complex method here]' does not conform to the required signature. Parameter types must be an entity or complex type, a collection of complex types, or one of the predefined serializable types.

Was doing a bin deployment where we don't have to worry about what's on the server.

Looked in:
http://timheuer.com/blog/archive/2009/12/10/tips-to-deploy-ria-services-troubleshoot.aspx [old]

http://blogs.msdn.com/b/saurabh/archive/2010/03/16/ria-services-application-deployment.aspx [newer]

But there's another DLL Saurabh missed that I found to have worked when deploying it after an umpeeth time:

System.ServiceModel

These are rest of the DLLs I deployed:

Hope that seeing this helps anyone else!