Topic: f.error_messages not replacing variables in production

I have ruby on rails app that I recently deployed to production from a test environment.  This is the first Rails app I've deployed to production.

I am using form_for and f.error_messages for displaying validation errors.  However when I pulled the code into my production environment and I have validation errors instead of getting the nice messages I receive locally and in test I get:

1 error prohibited this {{model}} from being saved

There were problems with the following fields:
{{attribute}} {{message}}

with none of the replacement variables replaced.  Everything is version controlled so I know there are no code differences.  I used rake rails:freeze:gems to package all of my libraries in the vendor/ folder of my app so as I understand there should be no differences there. 

I am at a total loss. 

I am using Rails 2.3.5

Anyone have any advice to offer?

Thanks,

dave