[Moo] Request.JSON dont send in json format

[eskimoblood]

The docs says that Request.JSON will automated sending and receiving
of JavaScript Objects in JSON Format. But that seems not be true.
Instead of using JSON.encode it uses the default formating in Request
(Hash.toQueryString). Sure I can use myRequest.send(JSON.encode
(myObject)). Is this a bug or to I understand the docs in a wrong way?