I, too, just dwnlded new lw onto Mac OS 10.3.7, pb g4. I looked up other threads on problems, did a safe shutdown, repaired permissions, looked for Install Limewire pkg. in receipts, but it wasn't there? Cannot get lw to open at all. The old one, 4.0, I think, had quit on me after running a long time, but I think it quit when I upgraded system to 10.3.7. Anyone got anymore ideas, cause I haven't a clue what now.