SpringSource/spring-amqp — pull request #19 by garyrussell (2012-03-21 14:58:58+00:00)
Title: AMQP-219 RabbitTemplate Conversion With Message

Previously, convertAndSend(), convertSendAndReceive() methods
"converted" an Object that was already a Message to a Message
with a null body.

Now, if the object is already a Message, no conversion is
performed.