I've been using Lion now for a few weeks, and I just tried for the first time using Lion to open up a new project. FCP wouldn't recognize my .R3Ds. I tried installing again the codec but it still won't take it. I opened up a previous project and it wouldn't take the .R3Ds either, even though they worked before. I am currently running FCP 7.0.3 and shot today on the Epic.