Rails - Oct 2004 - redirection bug ?

Hi
I use code from authentication example from ruby on rails web  page. 
Everything looked fine until i found thet when i log for the first time it
gives me bad redirection. When session[''return_to''] was set
everythig
had been fine so i changed  (look into my code) from 1 to 2.

this is from login controler

  def login     
     if Admins.authenticate(@params["username"],
@params["password"])!=
nil then
        @session[''logged_in''] = true
        if @session[''return_to'']!=nil then
            redirect_to @session[''return_to'']
        else

#1 this one doesn''t work pointing me to 
http://myapp/display/articles/display  where the first display came from 
?????    
            #redirect_to :controller=>''articles'',
:action=>''display''
#2 this one works fine
            redirect_to "/articles/display"
        end
     else
         flash[''notice''] = ''The password you entered
is not correct.''
        redirect_to :controller=>''login'', :action =>
''index''
     end
  end

What is the difference between those two lines if there is a difference 
? Is something wrong with me or with rewriting rules ?
Jacek