Rails - Oct 2010 - Error customization problem.

Hi,

 I have following models

class User < ActiveRecord::Base
 has_many    :addresses, :as =>:addressee, :dependent => :destroy
 accepts_nested_attributes_for :addresses, :allow_destroy => true
end

class Address < ActiveRecord::Base

  belongs_to :addressee, :polymorphic => true

  validates_presence_of  :address1, :maximum => 50,:message =>
"Address1
cannot be blank."
  validates_presence_of  :city,:message => "City cannot be blank."
  validates_presence_of  :state,:message => "State cannot be
blank."
  validates_presence_of  :zipcode,:message => "Zip Code cannot be
blank."
  validates_presence_of  :country,:message => "Country cannot be
blank."
end

also in my environment file(environment.rb)

  #Customize errors
  config.action_view.field_error_proc = Proc.new do |html_tag, instance|
    if instance.error_message.kind_of?(Array)
     %{<div class="input">#{html_tag}</div><div
class="error">&bull;#{[instance.error_message].join(''<br/>&bull;'')}</div>}
    else
     %{<div class="input">#{html_tag}</div><div
class="error">&bull;#{[instance.error_message].flatten.first}</div>}
    end
  end

when i am creating user it will give me all model validations error
properly.
but when i am updating user it only show user model validations. for
addresses if any error is there or it is not showing that message inside
my form. i am not understanding why this is happening? anybody can give
me how can i debug this problem?
  i have used  field_error_proc for customizing my error messages(show
error for field level)

  Please help me out what''s going wrong?
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