Hello Debian!I have the exact problem with my Ibook G4. It is just 5 months since I bought it. It is very frustrating. I have also been googling for months. I've been through everything from Java, Flash and Airportproblems. My latest theory is that it is a memory-over-heating-problem.
Have you found out what causes the freezes yet or should I send it away to Apple?
Best Regards, Ola from Sweden