U3DXT: How to setup Achievement Banners

I am using the latest version of U3DXT with Unity 4.3.4f1, Xcode 5.1.1, and iOS 7, and I am having trouble getting banners to show up when ac$$anonymous$$evements are unlocked in testing. I have verified that ac$$anonymous$$evements are being reported successfully, and show up in Game Center using Sandbox.

I've heard t$$anonymous$$s is a known issue, but I'm not 100% confident that it's set up properly for when it's in a production environment.

First: what's the best way to set "showsCompletionBanner"? Is it along the lines of t$$anonymous$$s?

 GKAc$$anonymous$$evement ac$$anonymous$$evement = new GKAc$$anonymous$$evement("com.company.game.ac$$anonymous$$evementname");
 ac$$anonymous$$evement.showsCompletionBanner = true;

Second: Assuming that doesn't work, I've tried to use OnAc$$anonymous$$evementReported, like t$$anonymous$$s:

     void OnAc$$anonymous$$evementReported (object sender, EventArgs e) 
     {
         if (CoreXT.IsDevice)
         {
             GameKitXT.ShowBanner("Ac$$anonymous$$evement Unlocked!", "Unknown");
         }
     }

As you can guess, I'd like to replace "Unknown" with the name of the ac$$anonymous$$evement. But what variables are stored in "e"? Or is it possible that the sender is a GKAc$$anonymous$$evement object? If anyone can shed light on that information, or tell me the proper way to set showsCompletionBanner to true, I'd be in your debt.

Thank you.