Ember Data - Date error when PUT to API - api

Question

I have setup a test where I try to PUT an item after fetching it. It fails on the dates when PUT'ing though. The date fields below use DS.attr('date').
Versions:
Ember : 1.1.1
Ember Data : 1.0.0-beta.4+canary.c15b8f80
Handlebars : 1.0.0
jQuery : 1.9.1
Here's my code:
BuildingsController
App.BuildingsController = Ember.Controller.extend({
actions: {
createBuilding: function() {
var store = this.get('store');
store.find('building', 1729).then(function(building) {
building.set('title', 'Test 123');
building.save();
});
}
}
});
Data returned from API when calling store.find:
{
"building":{
"id":"1729",
"name":"Test 123",
"sort":"1",
"published_at":"2013-09-26 11:00:27",
"source":"source test",
"content":"<p>content test<\/p>",
"excerpt":"<p>excerpt test<\/p>",
"lat":"62.39039989300704",
"lon":"17.341790199279785",
"address":"address",
"build_start":"2013-09-22",
"build_end":"2013-09-23",
"created_at":"2013-09-26 11:00:28",
"updated_at":"2013-09-26 11:00:28"
}
}
Data PUT to API:
{
"address" : "address",
"build_end" : "Mon, 23 Sep 2013 00:00:00 GMT",
"build_start" : "Sun, 22 Sep 2013 00:00:00 GMT",
"content" : "<p>content test</p>",
"created_at" : "undefined, NaN undefined NaN NaN:NaN:NaN GMT",
"excerpt" : "<p>excerpt test</p>",
"lat" : 62.39039989300704,
"lon" : 17.341790199279785,
"name" : "Test 123",
"published_at" : "undefined, NaN undefined NaN NaN:NaN:NaN GMT",
"sort" : 1,
"source" : "source test",
"updated_at" : "undefined, NaN undefined NaN NaN:NaN:NaN GMT"
}

Answer 1

You can use a custom attribute type (rather than DS.attr('date')) by registering a custom transform and handle serialization / deserialization manually:
DS.RESTAdapter.registerTransform("mydate", {
deserialize: function(serialized) {
// deserialize date here
return deserialized;
},
serialize: function(deserialized) {
// serialize date here
return serialized;
}
});
As described in this answer to What is the best way to modify the date format when ember-data does serialization?

Answer 2

I've been working with other projects and now I updated Ember from 1.1.1 to 1.1.2 which seem to have magically solved this problem. I'm guessing the update didn't have anything to do with my problem, though.
Thanks for taking your time.
// Stefan