Acts_as_ferret in Ruby on Rails

I successfully installed the Ferret gem on DH. My RoR site works perfectly with acts_as_ferret on my local computer, but when I upload it (via Capistrano), it seems like Rails never starts. I get errors like the following in the logs.

[Fri Oct 13 02:28:02 2006] [error] [client] FastCGI: incomplete headers (0 bytes) received from server “/home/NAME/RAILS_SITE/current/public/dispatch.fcgi”