Nice nested layouts -- this does what *I* expect, at least.

admin.html.haml

= inside_layout :application do
  %section.admin
    %header ...
    = yield
    %footer

admin_controller.rb

class AdminController < ApplicationController
  layout :admin
  
  def index
    render :dashboard
  end
end

application.html.haml

!!!
%html
  %head ...
  %body
    %header ...
    = yield
    %footer ...

dashboard.html.haml

%h1 Dashboard
...

nested_layouts_helper.rb

module NestedLayoutsHelper
  # Wrap some content inside a layout
  def inside_layout(layout, &block)
    layout = layout.to_s
    layout = layout.include?('/') ? layout : "layouts/#{layout}"
    controller.render_to_body(:layout => layout, :text => capture { block.call(@_content_for[:layout]) })
  end
end

capture { block.call(@_content_for[:layout]) }) should to be changed to capture { block.call(content_for :layout) })

at least it worked for me in 3.1.0.rc6

@rwz, please use nestive. It does the same thing but better. :-)