3-2-stable on Ruby 2.0, Psych error on bundle

Rails 3-2-stable on Ruby 2.0, Psych error on bundle: Due to an issue in Sprockets that fails in Ruby 2.0, I need...

> bundle Updating git://github.com/rails/rails.git Unfortunately, a fatal error has occurred. Please see the Bundler troubleshooting documentation at http://bit.ly/bundler-issues. Thanks! .rvm/rubies/ruby-2.0.0-preview1/lib/ruby/2.0.0/psych.rb:205:in `parse': (<unknown>): mapping values are not allowed in this context at line 8 column 35 (Psych::SyntaxError) from .rvm/rubies/ruby-2.0.0-preview1/lib/ruby/2.0.0/psych.rb:205:in `parse_stream' from .rvm/rubies/ruby-2.0.0-preview1/lib/ruby/2.0.0/psych.rb:153:in `parse' from .rvm/rubies/ruby-2.0.0-preview1/lib/ruby/2.0.0/psych.rb:129:in `load' from .rvm/rubies/ruby-2.0.0-preview1/lib/ruby/site_ruby/2.0.0/rubygems/specification.rb:491:in `from_yaml' from .rvm/gems/ruby-2.0.0-preview1@global/gems/bundler-1.2.1/lib/bundler.rb:294:in `block in load_gemspec_uncached' from .rvm/gems/ruby-2.0.0-preview1@global/gems/bundler-1.2.1/lib/bu...

Full article: http://stackoverflow.com/questions/13323363/rails-3-2-sta...