I'm using Ubuntu 9.04 and all seems to install without error. When I try and run gl_tail it quits and informs me I need to install net-ssh with:
sudo gem install -y net-ssh -r

I've done that a few times and it installs each time but still no such luck running gl_tail.

RubyGems Environment:
- RUBYGEMS VERSION: 1.3.1 - RUBY VERSION: 1.8.7 (2008-08-11 patchlevel 72) [x86_64-linux] - INSTALLATION DIRECTORY: /var/lib/gems/1.8 - RUBY EXECUTABLE: /usr/bin/ruby1.8 - EXECUTABLE DIRECTORY: /var/lib/gems/1.8/bin - RUBYGEMS PLATFORMS:

- ruby
- x86_64-linux

• GEM PATHS:
  • /var/lib/gems/1.8
  • /home/dave/.gem/ruby/1.8
• GEM CONFIGURATION:
  • :update_sources => true
  • :verbose => true
  • :benchmark => false
  • :backtrace => false
  • :bulk_threshold => 1000
• REMOTE SOURCES:
  • http://gems.rubyforge.org/

see: http://redmine.ruby-lang.org/issues/show/1401