Problem with render :layout with yield :something inside in Rails 2.2.2

Rails
1

Hi,

I got something like this:

_inner_layout.erb.html
<%= yield %>
<%= yield :sidebar %>

index.erb.html
<% render :layout => “inner_layout” do %>
should be rendered only once
<% end %>

After switching from Rails 2.1 to 2.2 the code above renders “should
be rendered only once” twice. If I add:
<% content_for :sidebar do %>
<% end %>

then everything is ok.