Installed the new beta; can't say much about it until somebody else leaks something which I can then cite without violating the NDA, but I can say that Pleco actually seems to work fine on it without modification - even our DRM system, which we were a bit worried about. (that may still have to change for policy reasons, but I'm optimistic that we might not have to force everybody to reauthorize their purchases when they upgrade to OS 6, which was a support nightmare we were very much hoping to avoid) So far no showstopper bugs, which we had to deal with on both OS 4 and OS 5, and since we're still getting occasional emails about people upgrading to iOS 5 having problems with a year-old version of Pleco I'm very much hoping that remains true.