On Rails 3.2环境
为什么我收到此错误？ 我甚至不在任何地方使用apple-touch-icon-precomposed.png？
**Started GET "/apple-touch-icon-precomposed.png" for 37.197.150.223 at 2013-07-22 16:52:10 -0700
2013-07-22T23:52:10.946520+00:00 app[web.1]:
2013-07-22T23:52:10.946520+00:00 app[web.1]: ActionController::RoutingError (No route matches [GET] "/apple-touch-icon-precomposed.png"):
2013-07-22T23:52:10.932584+00:00 heroku[router]: at=info method=GET path=/apple-touch-icon-precomposed.png host=biowattsonline.com fwd="37.197.150.223" dyno=web.1 connect=1ms service=167ms status=404 bytes=728
2013-07-22T23:52:10.946520+00:00 app[web.1]: .bundle/gems/ruby/1.9.1/gems/actionpack-3.2.11/lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
2013-07-22T23:52:10.946520+00:00 app[web.1]: .bundle/gems/ruby/1.9.1/gems/actionpack-3.2.11/lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
2013-07-22T23:52:10.946520+00:00 app[web.1]: .bundle/gems/ruby/1.9.1/gems/railties-3.2.11/lib/rails/rack/logger.rb:32:in `call_app'
2013-07-22T23:52:10.946520+00:00 app[web.1]: .bundle/gems/ruby/1.9.1/gems/railties-3.2.11/lib/rails/rack/logger.rb:18:in `call'
**
错误本身如果不是一个showstopper但我得到很多我不明白为什么。
想法主角？