Rails 2.3.11 and I18N question

Due to slightly different Gems on the development and the production
machines,
I’ve discovered that Rails 2.3.11 has I18N support in ActiveSupport.
Any
recommendations on whether to use the i18n gem (currently using 0.5.0)
or the
I18N support in ActiveSupport (apparently 0.4.1)?

TIA,
Jeffrey