ERROR: While executing gem ... (...) bad response Moved Permanently 301

Имеем вот такую ошибку:

gem list -r

*** REMOTE GEMS ***

ERROR: While executing gem ... (Gem::RemoteFetcher::FetchError)
bad response Moved Permanently 301 (http://gems.rubyforge.org/latest_specs.4.8)

Делаем следующее:

gem sources -a http://production.s3.rubygems.org/
gem sources -r http://gems.rubyforge.org/

Взято с: http://www.zeux.at/node/54