Hi -- I've posted an update to my recent "10 things to be aware of" post about the Ruby 1.8 to 1.9 transition: http://dablog.rubypal.com/2009/1/16/son-of-10-things-to-be-aware-of-in-ruby-1-9 It includes some new "things", and some links as suggested here on ruby-talk. Thanks to all for the feedback on the original! David -- David A. Black / Ruby Power and Light, LLC Ruby/Rails consulting & training: http://www.rubypal.com Coming in 2009: The Well-Grounded Rubyist (http://manning.com/black2) http://www.wishsight.com => Independent, social wishlist management!