hey.. I have heard at many places that Matshita UJ-845 is the new 8x DL superdrive in the updated mac minis.. However, my 1.42 ghz mac mini has this superdrive too.. The firmware version is DPP9. Is my superdrive a dual layer one? But it shows as a SL in System Profiler. How can the same Dvd-writer be a SL in an old Mac Mini and a DL in the updated ones? Is it due to Apple deliberately restricting it to single layer with the firmware?