Обновление Gem: невозможно преобразовать «\ xE7» в UTF-8 при преобразовании из ASCII-8BIT в UTF -8 в US-ASCII

только что запустил gem update на легком сервере, который давно не обновлялся. .. и я получаю множество сообщений "невозможно преобразовать" \ x ?? " в UTF-8 при преобразовании из ASCII-8BIT в UTF-8 в US-ASCII для ... "ошибок. Включено исключение из консоли. Кто-нибудь знает, что происходит?

$ sudo gem update
Installing ri documentation for railties-3.0.4...
Installing ri documentation for minitest-2.0.2...
Installing ri documentation for net-ssh-2.1.0...
unable to convert "\xE7" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII for lib/net/ssh/authentication/pageant.rb, skipping
unable to convert "\xC3" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII for lib/net/ssh/buffered_io.rb, skipping
unable to convert "\xC3" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII for lib/net/ssh/service/forward.rb, skipping
unable to convert "\xC3" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII for THANKS.rdoc, skipping
unable to convert "\xC3" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII for CHANGELOG.rdoc, skipping
Installing ri documentation for rails-3.0.4...
file 'lib' not found
Installing ri documentation for rails3-generators-0.17.4...
unable to convert "\xC3" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII for README.rdoc, skipping
Installing ri documentation for rdoc-3.5.3...
unable to convert U+201D from UTF-8 to US-ASCII for lib/rdoc/text.rb, skipping
unable to convert "\xC3" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII for History.txt, skipping
Installing ri documentation for rspec-core-2.5.1...
unable to convert "\xC2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII for lib/rspec/core/subject.rb, skipping
Installing ri documentation for rspec-expectations-2.5.0...
unable to convert "\xC2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII for lib/rspec/matchers.rb, skipping
Installing ri documentation for rspec-mocks-2.5.0...
Installing ri documentation for rspec-2.5.0...
Installing ri documentation for rspec-rails-2.5.0...