rss/maker gets a syntax error, but works fine from MRI. (I'm not using it directly, but the rails tests include it.) [james@ceantar ~]$ cat /tmp/r.rb require 'rss/maker' [james@ceantar ~]$ jruby /tmp/r.rb /home/james/jruby/lib/ruby/1.8/rss/maker/base.rb:13:in `append_features': /home/james/jruby/lib/ruby/1.8/rss/maker/base.rb:19: syntax error, expecting '\n' ',' tRPAREN but found kEND instead (SyntaxError) from /home/james/jruby/lib/ruby/1.8/rss/maker/base.rb:133:in `append_features' from /home/james/jruby/lib/ruby/1.8/rss/maker/1.0.rb:3 from /home/james/jruby/lib/ruby/1.8/rss/maker/1.0.rb:3 from /home/james/jruby/lib/ruby/1.8/rss/maker/1.0.rb:3 from /home/james/jruby/lib/ruby/1.8/rss/maker/1.0.rb:3:in `require' from /home/james/jruby/lib/ruby/1.8/rss/maker/1.0.rb:3:in `require' from /home/james/jruby/lib/ruby/1.8/rss/maker.rb:30:in `require' from /home/james/jruby/lib/ruby/1.8/rss/maker.rb:30:in `require' from /tmp/r.rb:1:in `require' from /tmp/r.rb:1:in `require' [james@ceantar ~]$ ruby /tmp/r.rb [james@ceantar ~]$ The .rb files in MRI and jruby are identical: [james@ceantar jruby]$ diff /usr/lib/ruby/1.8/rss/maker/base.rb /home/james/jruby/lib/ruby/1.8/rss/maker/base.rb [james@ceantar jruby]$