anchor.diff:      @data(@local_key) # just to register a dependence
       className = "#{@props.className} avatar"
   
  -    id = "avatar-#{user.key.split('/')[2]}"
  +    id = if @props.hide_face then "avatar-hidden" else "avatar-#{user.key.split('/')[2]}"
   
       if @props.img_style && user.key != -1
         avatar_file_name = user.avatar_file_name
  
positive.code:     key: '/user/-1' # defaults to anonymous user
      tag: R.img
      img_style: null #null defaults to the css-based b64 embedded images
  
    componentWillUpdate : -> 
      if @local.show_details
  
negative.code:   insertUserName : ->
      $el = $(@getDOMNode())
      pos = $el.offset()
      display_name = if @props.hide_face then 'Anonymous' else @data().name
      $name = $("<span class='hover_avatar_name'>#{display_name}</span>")
      $('body').append $name   # ugly!
  
      $name.css 
  