This is very annoying. Just flattened my Mac Pro HD for a new Leopard install. Went ahead and did it, all went fine... and now it won't connect to my wireless network using WEP, WPA, or anything apart from disabled. It just goes to "connection timed out" or "connection failed", leaving me with the only option of leaving my connection unsecured. This is driving me mad! There's surely no reason why this would become such a big issue. And yes, I have tried rebooting everything, etc.