在 ubuntu 的虚拟机里运行，AuthHash 能正常输出中文 挪到盛大云的 redhat 环境里，就不能显示中文了。都是 utf-8 环境

--- !map:OmniAuth::AuthHash 
provider: weibo
uid: 
info: !map:OmniAuth::AuthHash::InfoHash 
  nickname: "\xE8\x8B\x8F\xE6\x9D\xB0"
  name: "\xE8\x8B\x8F\xE6\x9D\xB0"
  location: "\xE5\x8C\x97\xE4\xBA\xAC \xE6\xB5\xB7\xE6\xB7\x80\xE5\x8C\xBA"

rails 3.1.2
omniauth (1.0.0)
omniauth-oauth (1.0.0.rc2)
omniauth-weibo (1.0.0.rc2)

class SessionsController < ApplicationController
  def create
    raise request.env['omniauth.auth'].to_yaml
  end

  protected

  def auth_hash
    request.env['omniauth.auth']
  end

  def destory
  end
end