Compile Error after upgrading to new Xamarin 4.0 and Forms 2.0

I've upgraded everything on the Mac and VS2013 with latest from Xamarin. Now getting the following error when compiling the iOS project. I've submitted a support request at ios@xamarin.com, but thought maybe someone has seen this and can point me in the right direction.

Error 3 Failed to resolve "UIKit.UITextAlignment Xamarin.Forms.Platform.iOS.Extensions::ToUITextAlignment(Xamarin.Forms.TextAlignment)" reference from "Xamarin.Forms.Platform.iOS, Version=1.5.0.0, Culture=neutral, PublicKeyToken=null" C:\Program Files (x86)\MSBuild\Xamarin\iOS\Xamarin.iOS.Common.targets 664 3

Thanks in advance!