Comment 8 for bug 105637

I'm still having issues, but it might be linked to the acerhk kernel module (which is the wireless led controller).

I need to activate the led, deactivate it, rmmod ath_pci, kill networkmanager, modprobe ath_pci, restart network manager, reactivate the led and only then it works. btw, it networkmanager doesn't show nearby routers unless manual connection attempt was commenced...

It might be a hardware design issue other then bug in networkmanager (beside the non-scanning part).
(I use Fujistu-Seimens laptop branded Amilo A1650G)