Rails 3.0.5 did nothing wrong.

The correct code for this:

    namespace :products do
      resources :comments do
        member do
          get :like
        end
      end
    end

Using a `get` without a `member` block leads to the misbehaviour as seen here, and it's also non-standard.

When defining additional actions for a resource one should always use a `member` block for actions that work on a single object or `collection` for those actions that work on many.