rescue_from_with_route_not_found.rb

  rescue_from ActionController::RoutingError, 
              ActionController::UnknownAction, 
              ActiveRecord::RecordNotFound,
              ActionView::MissingTemplate,
              ActionController::MethodNotAllowed,
              WillPaginate::InvalidPage, :with => :route_not_found

protected

  # 404
  def route_not_found
    render :template => 'welcome/404', :status => :not_found
  end