Here, I have a somewhat clean install of sup (gems + next branch), and here''s what I get at the end of sup-config : Ok, trying to run "bin/sup-add mbox:/home/shivan/.gmail.mbox"... /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'': no such file to load -- sup (LoadError) from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require'' from bin/sup-add:7 Something changed? -- Guillaume