I have committed some changes to both ruby-pg (the new module) and ruby-postgres (the old module) so that it would be easy for ActiveRecord to support them both.

Now I have submitted a patch ( http://dev.rubyonrails.org/ticket/10948 ) to ActiveRecord that passes "rake test_postgresql" for both modules. Note: the patch has not been applied to ActiveRecord yet, so I'm waiting on that.

The gem for ruby-pg is named "pg" and the gem for the older ruby-postgres is "postgres". The easiest way to install is:

# gem install --remote pg