Downgrading Rubygems

Installed latest Rubygems which broken my dev environment.

Rob-Laceys-MacBook-Pro:app roblacey$ ./script/rails s
/Library/Ruby/Site/1.8/rubygems/specification.rb:990:in `date=': invalid date format in specification: "2011-9-23" (Gem::InvalidSpecificationException)
    from /Users/roblacey/repos/app/ruby/1.8/bundler/gems/compass-cb709350942f/compass.gemspec:7
    from /Library/Ruby/Site/1.8/rubygems/specification.rb:1346:in `initialize'
    from /Users/roblacey/repos/app/ruby/1.8/bundler/gems/compass-cb709350942f/compass.gemspec:4:in `new'
    from /Users/roblacey/repos/app/ruby/1.8/bundler/gems/compass-cb709350942f/compass.gemspec:4

One to remember next time something screwy happens, and I am to lazy to use rvm

sudo gem uninstall rubygem-update -v 1.8.10
sudo gem install rubygems-update -v 1.5.2
sudo update_rubygems _1.5.2_