Охо-хо-хо, неопознанная ошибка, а ее могло бы и не быть...

HttpException: The controller for path '/post/202' was not found or does not implement IController.

Ошибка Controller = post, Action = 202

        
System.Web.HttpException (0x80004005): The controller for path '/post/202' was not found or does not implement IController.
   в System.Web.Mvc.DefaultControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType)
   в System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext requestContext, String controllerName)
   в System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory)
   в System.Web.Mvc.MvcHandler.<>c__DisplayClass6.<BeginProcessRequest>b__2()
   в System.Web.Mvc.SecurityUtil.<>c__DisplayClassb`1.<ProcessInApplicationTrust>b__a()
   в System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust[TResult](Func`1 func)
   в System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   в System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)