Renamed config interfaces properly with Section suffix, re-implemented the For<T> UmbracoConfiguration method to retreive specific settings... might use this entirely instead of the nested access as it might make it easier to mock.

src/Umbraco.Web/umbraco.presentation/viewstateMoverModule.cs

@@ -27,7 +27,7 @@ namespace umbraco.presentation
 
         void IHttpModule.Init(HttpApplication context)
         {
-            if (UmbracoConfiguration.Current.UmbracoSettings.ViewstateMoverModule.Enable)
+            if (UmbracoConfiguration.Current.UmbracoSettings.ViewStateMoverModule.Enable)
             {
                 context.BeginRequest += new EventHandler(context_BeginRequest);
             }