Rails - May 2006 - caches_action and render_component

I''ve made some test:
------------------ CODE ------------------
class FooController < ActionController::Base
  caches_action :foo
  def foo
    render_text ''Hello, foo<br />''
  end
end

class BarController < ActionController::Base
  def bar
    render :inline => <<-EOS
      Hello, bar <br />
      <%= render_component(:controller => ''foo'', :action
=> ''foo'', :id
=> params[:id]) %>
    EOS
  end
end

class FooBarController < ActionController::Base
  def foo_bar
    render :inline => <<-EOS
      Hello, bar <br />
      <%= render_component(:controller => ''foo'', :action
=> ''foo'', :id
=> params[:id]) %>
    EOS
  end
end
----------------- END CODE ---------------
When I access /foo/foo, I think that it should create a file
''/tmp/cache/localhost.3000/foo/foo.cache''. and it does.
When I access /foo/foo/1, it''s created a file
''/tmp/cache/localhost.3000/foo/foo/1.cache'', it''s
right.

When I access /bar/bar, I think that it should create a file
''/tmp/cache/localhost.3000/foo/foo.cache'', but it''s
created the file
''/tmp/cache/localhost.3000/bar/bar.cache''. And I access
/foo_bar/foo_bar, it''s created the file
''/tmp/cache/localhost.3000/foo_bar/foo_bar.cache''. Two files
are the
same content.