Well for posterity, my hunch is that the attachment data is gzipped and then base64 encoded on the client side but only base64 decoded once it reaches the gateway - the unzipping got lost somewhere in the RPC overhaul.
Well for posterity, my hunch is that the attachment data is gzipped and then base64 encoded on the client side but only base64 decoded once it reaches the gateway - the unzipping got lost somewhere in the RPC overhaul.