I just applied Apple security update 2007-004 to my powerbook (an ancient G3 Pismo running 10.3.9) & now when it wakes from sleep it doesn’t recognise my airport network. After a reboot it detects the network correctly, but once it goes to sleep again the airport network is lost. Turning the airport card on and off again does nothing, the only thing that resolves the issue is a reboot.If you are running 10.3.9, just be aware of what might happen when you install this update. It’s not a show stopper, but just really inconvenient.Update: 2007-05-02 Apple just released security update 2007-004 v1.1 and that seems to have fixed the problem.