title: Serving images from public folder loads onetime and shows 404 when i refresh again in production environment
body: <p>Image is present in the server but i get the message the server responded with a status of 404 (Not Found) 
  but when i copy the url and put in browser i get the image,but the same url i refresh i get 404.
  I don't know what is the issue it happens only in the server environment,It works fine in the local environment</p>
  
  <p>My app is deployed in the engine yard,using memcache dalli server </p>
  
  <p>Solutions tried:
     I had set config.serve_static_assets = true but i doesn't gave any solution.
     I had checked the image file format,its jpeg format and data is in binary format. 
     public image folder is given with full permission too.</p>