Topic: jbuilder missing template handler in nginx/unicorn production server

I'm getting the following error on my production server for both RABL and Jbuilder solutions in a Rails 3.2.2 app

Missing template mobile/android_users/create, secure_mobile_user/create, application/create with {:locale=>[:en], :formats=>[:json], :handlers=>[:erb, :builder]}

All works fine in development. I have tested jbuilder in the console on production server and it works.
I've restarted the nginx and unicorn after making sure that the appropriate gems are installed
It's quite clear that "[:erb, :builder]" is missing the jbuilder or rabl template handlers. Any ideas on how I can fix this?

What you want and what you need are too often not the same thing!
When your head is hurting from trying to solve a problem, stop standing on it. When you are the right way up you will see the problem differently and you just might find the solution.
(Quote by me 15th July 2009)