Hey guys, I've upgraded my Unity from version 4.2.2 to 4.3.1 and I'm getting a weird compile error with my upgraded project. Error building Player: Exception: Error: method `System.Reflection.Assembly System.Reflection.Assembly::GetAssembly(System.Type)` doesn't exist in target framework. It is referenced from IFacebook.dll at Facebook.FBBuildVersionAttribute Facebook.FBBuildVersionAttribute::getAttributes(System.Type). My code used to compile with the older version of Unity. Is there a setting I forget to change or something?