If you have ever called a WCF service from your Silverlight application and recieved the 'Not Found' message in the exception, you know how frustrating this can be. What was thought to be a simple solution, turned out to be a enlightening journey into the depths of Silverlight and WCF. In this talk we will explore what is required to return rich exception information from a WCF service to a Silverlight client application. In doing so, we will gain a deeper knowledge of how WCF, Silverlight, and the browser, all work together.