Requested unknown parameter '_id' from the data source for row

Hi,

Using sAjaxDataProp:"" in our dataTable. Works well for loading data through ajax.

Also using editor to interact with a REST api. Delete works well, but Create does not. Depending on how settings are set and data is returned from the server, we either get a "Requested unknown parameter '_id' from the data source for row" error message if we return created row using aaData or directly (as shown in example below) (property "_id" *is* in the data) or a "Uncaught TypeError: Cannot read property 'length' of undefined" if we only return something like 'true'.

Any idea what's wrong?

datatable:

			$(document).ready(function() {
				var editor = new $.fn.dataTable.Editor( {
					"ajaxUrl": {
						"create": "POST http://mydomain/api/site",
						"remove": "DELETE http://mydomain/api/site/_id_"
					},
					"domTable": "#table_sites",
					"dbTable": "sites",
 					"fields": [
						{
							"label": "{{col_name}}",
							"name": "name",
							"type": "text"
						}
					]
				} );

				$('#table_sites').dataTable( {
					"sDom": "<'row-fluid'<'span4'l><'span4'T><'span4'f>r>t<'row-fluid'<'span6'i><'span6'p>>",
					"bProcessing": true,
					"sAjaxSource": 'http://mydomain/api/site/list',
					"sAjaxDataProp": "",
					"fnCreatedRow": function( nRow, aData, iDataIndex ) {
						$(nRow).attr('id',aData["_id"])		//need this because server side data does not return DT_RowId
					},
					"aoColumnDefs": [
						{ "aTargets": [0], "sTitle": "{{col_id}}", "mData": "_id" },
						{ "aTargets": [1], "sTitle": "{{col_lang}}", "mData": "lang" },
						{ "aTargets": [2], "sTitle": "{{col_theme}}", "mData": "theme" },
						{ "aTargets": [3], "sTitle": "{{col_name}}", "mData": "name" },
						{ "aTargets": [4], "sTitle": "{{col_type}}", "mData": "type" },
						{ "aTargets": [5], "sTitle": "{{col_version}}", "mData": "version" },
						{ "aTargets": [6], "sTitle": "{{col_created}}", "mData": "created" },
						{ "aTargets": [7], "sTitle": "{{col_modified}}", "mData": "modified" }
					],
					"oTableTools": {
						"sRowSelect": "single",
						"aButtons": [
							{ "sExtends": "editor_create", "editor": editor },
							{ "sExtends": "editor_remove", "editor": editor }
						]
					}
				} );
			} );

json returned on create:

{"name":"asdfasdfasdf2","type":"general","version":"1.0","theme":"client-planetebebe","created":1355865082,"modified":1355865082,"lang":"en-CA","_id":"ID:50d0dbfa3b8e77be4000000c"}