Custom response headers

This works for me in a fresh rails 3.0.3 app:

Controller

class PeopleController < ApplicationController
  def index
    response.headers["Headertitle"]="Headercontent"
    render :text => Rails.version
  end
end

Demo

curl -i http://localhost:3001/people

HTTP/1.1 200 OK 
X-Ua-Compatible: IE=Edge
Etag: "895661fb4afa992a391c33b5534d0f9f"
Connection: Keep-Alive
Content-Type: text/html; charset=utf-8
Headertitle: Headercontent
Date: Sat, 08 Jan 2011 17:18:23 GMT
Server: WEBrick/1.3.1 (Ruby/1.8.7/2010-01-10)
X-Runtime: 0.040454
Content-Length: 5
Cache-Control: max-age=0, private, must-revalidate

3.0.3%

I'm also using rails 3.0.3 and it worked fine for me as well.

Controller

class AppController < ApplicationController
  def example
    response.headers["Headertitle"]="Custom Header Content"
    render :text => "Hello, world."
  end
end

Viewed in Chrome

Headertitle:Custom Header Content

Problem disappeared when I started Passenger in the Ruby on rails application directory and used application with it. I am not experienced to deploy Rails applications but I think that before the passenger, the application was executed by Mongrel.

So, there probably is not bug in Rails?