subclasses with inherited_resources?

I'm trying out inherited_resources and so far so good. However, one
problem I've run into is that it's very difficult to customize
inherited_resource behaviour in subclasses. Looking through the
source I see it uses things like undef_method and class_attribute.
For example, if I have the following controllers:

class ItemsController
  inherit_resources
  actions :new, :create

  def create
    # custom stuff here
    creat!
  end

end

class VideoController < ItemsController
  actions :new, :create, :show
end

videos controller will not respond to /show because
inherited_resources undefined it in ItemsController. One thing I
tried was to call inherit_resources again at the top of
VideoController, so it reloads all of inherited_resources default
actions, but also over-writes the custom :create action in
ItemsController

Am I overlooking something or is IR not supposed to be used for
inheritance like this?