Проблема с обновлением rubygems через rvm

Пытаюсь обновить RubyGems до версии 1.8.10 через RVM и вот такая ошибка:

$ rvm rubygems latest
Removing old Rubygems files...
Installing rubygems-1.8.10 for ruby-1.9.2-p180 ...
ERROR: Error running 'GEM_PATH="/Users/foo/.rvm/gems/ruby-1.9.2-p180:/Users/foo/.rvm/gems/ruby-1.9.2-p180@global:/Users/foo/.rvm/gems/ruby-1.9.2-p180:/Users/foo/.rvm/gems/ruby-1.9.2-p180@global" GEM_HOME="/Users/foo/.rvm/gems/ruby-1.9.2-p180" "/Users/foo/.rvm/rubies/ruby-1.9.2-p180/bin/ruby" "/Users/foo/.rvm/src/rubygems-1.8.10/setup.rb"', please read /Users/foo/.rvm/log/ruby-1.9.2-p180/rubygems.install.log
WARN: Installation of rubygems did not complete successfully.

При проверке лог-файла (rubygems.install.log) выдает следующее:

[2011-09-27 21:16:57] GEM_PATH="/Users/foo/.rvm/gems/ruby-1.9.2-
p180:/Users/foo/.rvm/gems/ruby-1.9.2-p180@global:/Users/foo/.rvm/gems/ruby-1.9.2-p180:/Users/foo/.rvm/gems/ruby-1.9.2-p180@global" GEM_HOME="/Users/foo/.rvm/gems/ruby-1.9.2-p180" "/Users/foo/.rvm/rubies/ruby-1.9.2-p180/bin/ruby" "/Users/foo/.rvm/src/rubygems-1.8.10/setup.rb"
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/f_sync_dir.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_header.rb, skipping
unable to convert U+00E1 to US-ASCII in conversion from ISO-8859-1 to UTF-8 to US-ASCII for lib/rubygems/package/tar_input.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_output.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_reader/entry.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_reader.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_writer.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package.rb, skipping
unable to convert U+0160 from UTF-8 to US-ASCII for History.txt, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/f_sync_dir.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_header.rb, skipping
unable to convert U+00E1 to US-ASCII in conversion from ISO-8859-1 to UTF-8 to US-ASCII for lib/rubygems/package/tar_input.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_output.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_reader/entry.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_reader.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_writer.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package.rb, skipping
unable to convert U+0160 from UTF-8 to US-ASCII for History.txt, skipping
ERROR:  While executing gem ... (RDoc::Error)
    error generating index.html: Error while evaluating /Users/foo/.rvm/gems/ruby-1.9.2-p180/gems/rdoc-3.9/lib/rdoc/generator/template/darkfish/index.rhtml: undefined method `[]' for nil:NilClass (RDoc::Error)
RubyGems 1.8.10 installed

Есть ли у кого-нибудь идеи, что может быть не так с обновлением? Пробовал также удалить rubygems через RVM, а затем снова запустить обновление, но безрезультатно.

Обновление: Похоже, что rvm не смог запустить Ruby 1.9.2.

$ rvm use 1.9.2 WARN: ruby ruby-1.9.2-p290 is not installed. To install do: 'rvm install ruby-1.9.2-p290' 

Итак, после установки 1.9.2-p290 установка rubygems завершилась успешно.

$ rvm use 1.9.2
Using /Users/foo/.rvm/gems/ruby-1.9.2-p290

$ rvm rubygems latest
Removing old Rubygems files...
Installing rubygems-1.8.10 for ruby-1.9.2-p290 ...
Installation of rubygems completed successfully.

Это сработало для меня.