 public class ViewModel: ViewModelType
 {
     /// Used as general `title`
-    public let title: ReactiveCocoa.MutableProperty<String?>
+    public let title = MutableProperty<String?>(nil)
     
     /// Whether the view model is currently "active."
     ///

    /// [ReactiveViewModel.](https://github.com/ReactiveCocoa/ReactiveViewModel)
    ///
    /// This property defaults to false.
    public let active = ReactiveCocoa.MutableProperty(false)
    
    /// Observes the receiver's `active` property, and sends the receiver whenever it
    /// changes from false to true.

    /// Initializes a ViewModel.
    public init()
    {
        let errors: (Signal<Signal<ViewModelErrorType, NoError>, NoError>, Observer<Signal<ViewModelErrorType, NoError>, NoError>) = Signal.pipe()
        
        self.errors = errors.0.flatten(.Merge)
