class Bundler::RubygemsIntegration

def backport_segment_generation

by monkeypatching it into the method in Rubygems 1.3.6 and 1.3.7.
This backports the correct segment generation code from Rubygems 1.4+

def backport_segment_generation
  Gem::Version.send(:define_method, :segments) do
    @segments_generated ||= false
    unless @segments_generated
      @segments ||= @version.scan(/[0-9a-z]+/i).map do |s|
        /^\d+$/ =~ s ? s.to_i : s
      end
    end
    @segments_generated = true
    @segments
  end
end