Well, remember that back in March, when the new iPad wasn’t even announced yet but rumors were so clear that a retina-display iPad was coming, the Twitterrific developers published an update to their app supporting @2x graphics?
Turned out they had to rebuild their app with an updated version of Xcode, which was released the same day the new iPad was announced. Previous versions didn’t support retina iPad graphics.
You can’t just add a few @2x retina graphics to target an unannounced Apple device and expect them to work. Apple wants you to opt-in. Prepare for a new build after Xcode is updated.
In other news: I can’t wait for the new MacBook Pros.