I downloaded gems and ran sudo ruby setup.rb which seemed to run OK.

When I run gem, though, I get

sexy-beast:~ user$ gem
/usr/local/lib/ruby/site_ruby/1.8/rubygems/cmd_manager.rb:52:in
`initialize': uninitialized constant Gem::CommandManager::HelpCommand
(NameError)
        from
/usr/local/lib/ruby/site_ruby/1.8/rubygems/cmd_manager.rb:46:in
`instance'
        from
/usr/local/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:25:in `run'
        from /usr/local/bin/gem:23

any ideas?

.bash_login contains
export PATH="/usr/local/bin:/usr/local/sbin:/usr/local/mysql/bin:$PATH"

and which gem returns

sexy-beast:~ user$ which gem
/usr/local/bin/gem

Thank you!
-- Andre