rake，错误

(tuan)   rvm/gems/ruby-1.8.7-p371@tuan800/gems/newrelic_rpm-3.5.8.72/lib/new_relic/rack/browser_monitoring.rb:12:in `call'
lib/website/middlewares/grid_fs_server.rb:55:in `call'
lib/website/middlewares/downcase_route_middleware.rb:12:in `call'

原因：rake版本应该是0.8.7