unicorn_rails

I, [2010-12-06T09:33:27.030001 #27061]  INFO -- : unlinking existing socket=/tmp/.unicorn-socket
I, [2010-12-06T09:33:27.030259 #27061]  INFO -- : listening on addr=/tmp/.unicorn-socket fd=3
I, [2010-12-06T09:33:27.030806 #27061]  INFO -- : Refreshing Gem list
/usr/local/lib/ruby/gems/1.8/gems/bundler-1.0.3/lib/bundler/runtime.rb:27:in `setup': You have already activated rack 1.0.1, but your Gemfile requires rack 1.2.1. Consider using bundle exec. (Gem::LoadError)
	from /usr/local/lib/ruby/gems/1.8/gems/bundler-1.0.3/lib/bundler/spec_set.rb:12:in `each'
	from /usr/local/lib/ruby/gems/1.8/gems/bundler-1.0.3/lib/bundler/spec_set.rb:12:in `each'
	from /usr/local/lib/ruby/gems/1.8/gems/bundler-1.0.3/lib/bundler/runtime.rb:17:in `setup'
	from /usr/local/lib/ruby/gems/1.8/gems/bundler-1.0.3/lib/bundler.rb:100:in `setup'
	from /var/www/releases/20101206173428/config/boot.rb:8
	from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
	from /var/www/releases/20101206173428/config/application.rb:1
	from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
	from /var/www/releases/20101206173428/config/environment.rb:2
	from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
	from config.ru:3
	from /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/builder.rb:29:in `instance_eval'
	from /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/builder.rb:29:in `initialize'
	from config.ru:1:in `new'
	from config.ru:1