I'm using REST as well, so maybe I can offer some thoughts on this.
POST is used when sending data to a URL endpoint, and often it means
an entity is created, like an SQL INSERT. PUT is used to update
some properties of an already existing entity, like an SQL UPDATE.
At least that's the most common use. So with a POST reply I create
an entity and return the URL in the 'location' header of the
response. A PUT request applies the parameters to the entity
identified by the URL.
Strange. To me that seems counterintuitive and not really in sync
with how PUT is described[1] in RFC 2616. But, anyway, if you REST
guys think you need this, send a reasonable patch[2] and I'll review
it.
Since I just jumped from 0.5.0 to 0.11.1, do you remember where in that span you made the change to remove post-param support for PUT? I'll start diffing from there....