MonoTouch Twitter Bug

gistfile1.cs

// Error:
// Wrapper type 'MonoTouch.Twitter.TWTweetComposeViewController' is missing its native ObjectiveC class 'TWTweetComposeViewController'. Please check if it's been linked.

// Other Info:
// - I am targetting v 5.0
// - I have tried switching linking on and off, to no avail
// - I have the latest MonoTouch installed

// My code:

	public partial class MyViewController : UIViewController
	{
		private TWTweetComposeViewController tweetSheet;

		public override void ViewDidLoad()
		{
			var shareButton = new UIBarButtonItem(UIBarButtonSystemItem.Reply);
			shareButton.Clicked += (sender, e) => {
				tweetSheet = new TWTweetComposeViewController();
				tweetSheet.SetInitialText("My tweet!");
				PresentModalViewController(tweetSheet, true);
			};
			NavigationItem.RightBarButtonItem = shareButton;
		}
		
		...