Have you considered that the fault lies with the only thing these systems have in common? Maybe the router is faulty, or there's a bug in the firmware revision it's running.
I have 2 wireless networks- 5 macs and many guests. Most guests are running Tiger & some Leopard.
One network - never any problems getting on for anybody and any computer.
But this other network (different router) about 20% of the guests and NOW my Sawtooth running 10.4.11 CANNOT be authenticated by the network. I have no idea why it happened - whereas in the past there was no problem. Bear in mind the WPA password and router are all correct. Signal is fine. I have it set to mix with B and G networks.
I've trashed prefs, caches etc. What do I need to do to authenticate this one problem network? Why for some it's ok and others not? Same distance- just different computers. What is interfering with the authentication? I am a power user so I'll understand all instructions.
Thanks so much. It is making me crazy.
I have a feeling that if I update my Sawtooth to Leopard- I will be able to use this network.