When rendering a partial and specifying a layout through a js request like render :partial => 'index', :layout => 'layouts/content_holder' custom yield regions such as yield :h1_text defined in the layout are rendered as yield instead of yield :h1_text causing duplicate content to appear.

My environment is Rails 3.1.1, Ruby 1.9.2, Ubuntu 11.10

To reproduce Yield Render Layout Bug

1. Rake the database
2. Navigate to homepage
3. Notice text is different in both red boxes
4. Click the "Remote Foods Index" link to see "yield" rendered in both boxes.