Sometimes one of the tiles returned from the World_Street_Map is displayed incorrectly in a Silverlight API 2.4 C# application. The following line of xaml: <esri:ArcGISTiledMapServiceLayer ID="World Street Map" Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer" Visible="True"/> is used to reference the World_Street_Map ESRI REST service. Most of the time there is not a problem. I used Fiddler to identify the tiles being returned from the service and found a problem with the tile served from "http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/5/9/6". The problem has also shown up with the World_Top_Map service and at different locations.
So far I have only documented the problem from within our State network.
I was wondering if anyone else has had intermittent problems with ESRI tiled map services from within Silverlight API applications.