I have: config.serve_static_assets = true
...but I don't have anything with: config.action_dispatch.x_sendfile_header ...at all. Perhaps you are doing something unnecessarily in my case? You can view my app "teamlab" yourself on Heroku if you like. I can file a support ticket if necessarily. Also, you didn't answer my first question: "what is this about" ? :) Thanks, - Trevor -- You received this message because you are subscribed to the Google Groups "Heroku" group. To post to this group, send email to heroku@googlegroups.com. To unsubscribe from this group, send email to heroku+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/heroku?hl=en.