defaulting Backbone.Collection#model to be Backbone.Model

backbone.js

@@ -276,7 +276,8 @@
   // or unordered. If a `comparator` is specified, the Collection will maintain
   // its models in sort order, as they're added and removed.
   Backbone.Collection = function(models, options) {
-    if (options && options.comparator) {
+    options || (options = {});
+    if (options.comparator) {
       this.comparator = options.comparator;
       delete options.comparator;
     }
@@ -288,9 +289,11 @@
   // Define the Collection's inheritable methods.
   _.extend(Backbone.Collection.prototype, Backbone.Bindable, {
 
+    model : Backbone.Model,
+
     // Initialize or re-initialize all internal state. Called when the
     // collection is refreshed.
-    _initialize : function() {
+    _initialize : function(options) {
       this.length = 0;
       this.models = [];
       this._byId = {};

test/collection.js

@@ -79,4 +79,12 @@ $(document).ready(function() {
     equals(lastRequest[1], col);
   });
 
+  test("collections: create", function() {
+    var model = col.create({label: 'f'});
+    equals(lastRequest[0], 'POST');
+    equals(lastRequest[1], model);
+    equals(model.get('label'), 'f');
+    equals(model.collection, col);
+  });
+
 });