turned on mutex in dev. totally my bad

Gemfile

 source 'http://rubygems.org'
 
 gem 'rails', '3.0.0.beta4'
-gem 'mongrel'
 gem 'thin'
 gem 'em-http-request', :require => "em-http", :git => "git://github.com/igrigorik/em-http-request.git"
 gem 'addressable', :require => "addressable/uri"

config/environments/development.rb

@@ -16,5 +16,5 @@ Diaspora::Application.configure do
 
   # Don't care if the mailer can't send
   config.action_mailer.raise_delivery_errors = false
-  config.threadsafe!
+  #config.threadsafe!
 end