I can no longer access my Django app via a nginx / fastcgi proxy on Centos 5.7 after upgrading to Django 1.4.2

Upgrading nginx via yum didn't solve the problem.

The error message in the logs is:

upstream sent unsupported FastCGI protocol version: 60 while reading response header from upstream

There's a thread in the Russian list on this error. Can any Russian speakers shed any light on this?

Thanks

Michela