Here's the thing, my routes don't specify a controller. 

Here a few of my routes  

routes.Add(new Route("flight/{flightNumber}", new MvcRouteHandler())
{
    Defaults = new RouteValueDictionary(new { controller = "Flights", action = "GetFlightForToday", flightNumber = "" }),
});

routes.Add(new Route("flight/{date}/{flightNumber}", new MvcRouteHandler())
{
    Defaults = new RouteValueDictionary(new { controller = "Flights", action = "GetFlight", date = DateTime.Today.ToString("MM/dd/yyyy"), flightNumber = "" }),
});

routes.Add(new Route("flights", new MvcRouteHandler())
{
    Defaults = new RouteValueDictionary(new { controller = "Flights", action = "GetAllFlights"}),
});

routes.Add(new Route("flights/active", new MvcRouteHandler())
{
    Defaults = new RouteValueDictionary(new { controller = "Flights", action = "GetActiveFlights" }),
});

rjcox

What are your routes? (Do they contain an .mvc extension? See the comment in the default global.asax.cs from the project template.)