This is not really a patch per se, but there doesn't seem to be a defect tracker. 

Tried building the Framework gem with rake gem: 

Windows XP 
Ruby 1.8.6 patchlevel 287 
Rubygems 1.3.5

Rakefile is using deprecated, now extinct api call: Gem::manage_gems

Going forward should remove that and replace with: 

require 'rubygems/gem_runner'
Gem.manage_gems if Gem::RubyGemsVersion.to_f < 1.0


depending on backward compatibility requirements.