Viewing WCF Binary-encoded messages in Fiddler

RIA Services (because it is based on WCF) binary encodes the messages it sends across.  These are a pain to try and read when using Fiddler. 

MSDN has a plugin for Fiddler that decodes the message and displays the decoded XML:

Super simple to use, just download and drop the DLL in the Inspectors folder of the Fiddler installation folder.  Details here, and download directly here.