[iOS] Databinding broken after 1.3.1

So as I'm sure most of you know, after 1.3.1 there were troubles getting apps running on iOS devices. I'm unsure if it's because I installed the update (http://forums.xamarin.com/discussion/comment/98145/#Comment_98145) that Brendan suggested, or if it's just a new problem introduced in 1.3.1, but...
Databinding is broke. But not completely. Basically, it works as following:

• Setting up a view model and set BindingContext to it, then creating the SetBinding's for all controls: Broke
• Setting up a view model and set BindingContext to it, then creating the SetBinding's for all controls. Then manually invoking OnPropertyChanged: Broke
• Setting up a view model and set BindingContext to it, then creating the SetBinding's for all controls Manually change each value to the null/default value, and running OnPropertyChanged, and then setting it back to its previous value: Works

While on Android (and presumably also WP. Haven't tried) it works without a hitch. As soon as I create the SetBinding, it hooks up and responds to all PropertyChanged events.

I am unable to reproduce this in a separate project, however I cannot see what I'm doing different in my current project.
Has anyone experienced similar issues?

Thanks