SharePoint Online cross-origin framing, changing page in autohosted MVC app

Hi
I have created SharePoint Autohosted app on MVC5 template. I have created a controller and the Index view associated with it. The view is responsible for showing the user a list of announcements, taken from database and passed to the view through the model.
In the layout page for this view I have the link for Create Announcement view which is in the same Announcements folder, and the same controller is responsible for showing it. When I include the app in the page using Client Web Part the Index view is showing
correctly, and I can see the hyperlinks to Create Announcement page. When I click the link I am presented with blank page within the webpart container and in Firebug I can see:
Load denied by X-Frame-Options: https://GUID.o365apps.net/Announcements/Create?SPHostUrl=site_collection_address does not permit cross-origin framing.
Why? This is the same domain, right?
I have already tried <webpartpages:allowframing runat="server" /> and httpmodules. Those do not work. BTW Why?
I am really frustrated, please give me some advice what to do.
Thanks in advance

Alright, this is freaking riddiculous. I have found the issue after 8 hours of digging in this mud. This little jebaka was in the Create view markup:
@Html.AntiForgeryToken()
And this also has to be thrown out as far as possible:
[ValidateAntiForgeryToken]
from every method which is decorated with it (ie. all POST methods)
I know, I know, security blah blah blah.
If the app is not working at all, there is no need for security.
I still hope for a word of explanation from someone from M$. I would really be pleased to know how should it be done in the right way.

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