AJAX GET requests returning "uninitialized constant Mime::RJS"

Hey all, I thought this was working until recently. I'm using
link_to_remote:

   link_to_remote("More info", :url => user_path(user),
                                            :update =>
"show_#{user.id}",
                                            :method => :get) #
NOTE: "GET" request

This then updates a hidden div ("show_123" for example). My
users_controller.rb is standard:

  def show
    @user = User.find(params[:id])

    respond_to do |format|
      format.rjs
      format.html { raise "AJAX only for this method" }
      format.xml { render :xml => @user.to_xml }
    end
  end

(The format.html catch is just for debugging for now)

But it doesn't get very far - the routing works but then all I get in
my development.log is an error:

   uninitialized constant Mime::RJS

The file show.rjs exists, and everything appears ok. Any ideas? As I
said, I thought this was working until recently. Is the "GET" screwing
RJS up? (because a "POST" doesn't route correctly)

Thanks,
Nate

Crap, silly typo, should be "format.js" (NOT "format.rjs")

Sorry for the bother... more coffee