相关疑难解决方法(0)

我运行捆绑更新来更新我的宝石.现在,当我尝试启动本地开发服务器时,我得到了这个.谁知道如何解决？

hostname:myapp username$ rails s
/Users/username/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems.rb:238:in `activate': can't activate i18n (~> 0.4.1, runtime) for ["mail-2.2.10", "actionmailer-3.0.3", "rails-3.0.3"], already activated i18n-0.5.0 for ["activemodel-3.0.3", "actionpack-3.0.3", "rails-3.0.3"] (Gem::LoadError)
    from /Users/username/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems.rb:254:in `block in activate'
    from /Users/username/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems.rb:253:in `each'
    from /Users/username/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems.rb:253:in `activate'
    from /Users/username/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems.rb:254:in `block in activate'
    from /Users/username/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems.rb:253:in `each'
    from /Users/username/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems.rb:253:in `activate'
    from /Users/username/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems.rb:254:in `block in activate'
    from /Users/username/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems.rb:253:in `each'
    from /Users/username/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems.rb:253:in `activate'
    from /Users/username/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/rubygems.rb:1065:in `gem'
    from /Users/username/.rvm/gems/ruby-1.9.2-p0@rails3/bin/rails:18:in `<main>'