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