I'm using a custom font for many labels, and I'm using a custom renderer to make them work on Android as discussed here: http://developer.xamarin.com/guides/cross-platform/xamarin-forms/working-with/fonts/.
Unfortunately, the upgrade to 184.108.40.20692 has broken this. The label displays correctly initially, as the typeface is set in the renderer's OnElementChanged method, but if the label text changes, the font reverts back to the default one. I've played around a bit with the FontFamily property that's been added, but I haven't found how/if I can make it work with a custom font on Android and have found no documentation on it.
Has anyone else run into this? Any solutions available?