/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:267:in `load_missing_constant': uninitialized constant Tagging (NameError)
        from /usr/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:453:in `const_missing'
        from /usr/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/dependencies.rb:465:in `const_missing'
        from /usr/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/inflector.rb:251:in `constantize'
        from /usr/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/core_ext/string/inflections.rb:148:in `constantize'
        from /www/rubylib/has_many_polymorphs.rb:195:in `inject_before_save_into_join_table'
        from /www/rubylib/has_many_polymorphs.rb:143:in `has_many_polymorphs'