Upgrading from rails 3.1.0.rc to final notes

note.md

Asset Pipeline changes

There's a manifest it has a bug rails/rails#2772, which means if you use config.assets.prefix, you need to add config.assets.manifest = false to your config/application.rb.

Also, there is a new default in the production environment template.

   config.assets.digest=true

Without that, precompiled assets won't work correctly all the time.