Rails - Apr 2009 - validators.rb breaks on update from Rails 2.2.2 to 2.3.2

Hi,

I just upgrade from 2.2.2 to 2.3.2 and the following error when trying
to start the server

=> Booting Mongrel
=> Rails 2.3.2 application starting on http://0.0.0.0:3000
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/
active_support/core_ext/module/aliasing.rb:33:in `alias_method'':
undefined method `valid?'' for class `ActiveRecord::Base''
(NameError)
  from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/
active_support/core_ext/module/aliasing.rb:33:in `alias_method_chain''
  from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/
active_record/callbacks.rb:224:in `send''
  from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/
active_record/callbacks.rb:224:in `included''
  from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/
active_record/callbacks.rb:223:in `each''
  from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/
active_record/callbacks.rb:223:in `included''
  from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/
active_record/base.rb:3143:in `include''
  from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/
active_record/base.rb:3143
  from /opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/
active_record/base.rb:3137:in `class_eval''
   ... 11 levels...
  from /opt/local/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/commands/
server.rb:84
  from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:
31:in `gem_original_require''
  from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:
31:in `require''
  from ./script/server:3

I figured out that by commenting out the validators.rb (http://
pastie.org/457289) that I used so far it''ll start up fine.

Apparently the issue lies with valid? but I can''t figure out how to
fix it.

Does anyone know how to go about this?

Cheers,

JM