Does not work with Rails 2.3.8

[martinos]

In ActiveSupport 2.3.8, the parent method is defined in the Module class which conflicts with the acts_as_tree parent method.

http://github.com/rails/rails/blob/v2.3.8/activesupport/lib/active_support/core_ext/module/introspection.rb

[benoror]

Same here, any alternative?