I have a G4 AGP 400 and it will no longer start up in OS X. It never had any problems before I installed Jaguar, now it won't boot up. It will take forever at the grey apple screen and then it shows the white box with the progress bar. Once it is done with that, A grey box pops up saying that I need to restart in 4 or 5 languages. I had to reinstall Jaguar once because of the same thing. I then got it to work again, but this time I cannot get it to start up. I have reset the PRAM, pulled out the little battery, hit the little grey button, done those weird commands at startup. I have unplugged everything that isn't essential. I have checked the RAM and pulled it out, everything that I know. It will still boot into 9. I am beginning to get very pissed off at Jaguar since I had to pay $120 for it, and I think I will stay with 9 if I have to use 10.1. Somebody please help me!!!!