rails/rails — Issue #4781: Caching data no longer works 
Author: bridgeutopia
Created: 2012-01-31 08:38:47+00:00
State: open

I use Rails 3.2.1 and when I run

rails s -e production

Access any page (and most pages use fragment caching) and nothing shows up.

Googled a bit and I found someone else is also having a similar problem:

http://www.ruby-forum.com/topic/3543480