restful route paths... has something changed?

So I have this

  resources :forums do
    resources :topics
  end

But when I try to do this:

  <%= forum_topics_path(1, 2) %>

I get:

  /forums/1/topics.2

Why the dot? Expecting a slash

This is rails3.. so maybe I am doing it wrong to what I'm used to

cheers for any info!

Oh just worked it it out

Should be using "forum_topic_path"

sorry for the spam