Rubiniusインストール

Rubinius for the Layman, Part 3 - Try Rubinius in 20 minutes - Programblings見ながら、インストールしてみた。

>bin/rbx -v
rubinius 0.10.0 (ruby 1.8.6 compatible) (ecaa42caa) (12/31/2009) [i686pc-linux-gnu]
>bin/rbx -e 'puts "Hello!"'
Hello!

だが、Rubiniusの対話モードを起動しようとすると、

>bin/rbx
An exception has occurred:
      Tried to use object of type Object (39) as type Module (34) (TypeError)

Backtrace:
              IRB::Locale#lc2kconv at /home/xx/rubinius/lib/irb/locale.rb:26
                IRB::Locale#String at /home/xx/rubinius/lib/irb/locale.rb:44
             IRB::Locale#real_load at /home/xx/rubinius/lib/irb/locale.rb:130
               IRB::Locale#load {} at /home/xx/rubinius/lib/irb/locale.rb:121
                        Array#each at kernel/common/array.rb:527
                  IRB::Locale#load at /home/xx/rubinius/lib/irb/locale.rb:-1
                    IRB.init_error at /home/xx/rubinius/lib/irb/init.rb:121
                         IRB.setup at /home/xx/rubinius/lib/irb/init.rb:18
                         IRB.start at /home/xx/rubinius/lib/irb.rb:54
                   main.__script__ at /home/xx/rubinius/lib/bin/irb.rb:13
 CompiledMethod#activate_as_script at kernel/common/compiled_method.rb:253
          CompiledMethod#as_script at kernel/common/compiled_method.rb:246
               Compile.single_load at kernel/common/compile.rb:247
              Compile.unified_load at kernel/common/compile.rb:103
            Kernel(Object)#require at kernel/common/compile.rb:448
                 Object#__script__ at kernel/loader.rb:276

うーん。調べてみる。
kconv.rbがlibにないから？っぽいけど・・・インストールやり直してみるか
ちなみにlocaleは「ja_JP.UTF-8」