Chris Kampmeier posted a ticket for a problem that breaks the rails AR tests on Ruby 1.8.6. https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/2603 There is basically a chicken and egg problem with using tap to add the load path for activesupport since tap is defined in activesupport. We have both proposed a solution to the problem. Please take a look at this problem which interferes with working on other issues. Thanks, Anthony