celery/kombu — pull request #149 by xtfxme (2012-07-30 20:27:05+00:00)
Title: [issue #148] transport/librabbitmq: KeyError prevents further handling

Kombu ordinarily sets the `content_type` and `content_encoding` standard
AMQP properties; in the event a message enters circulation *without* these
headers, Kombu triggers a KeyError, and enters an unrecoverable loop precluding
user handlers from ever reviewing, or even *recieving* the message.