I installed Leopard yesterday and was setting it up more today. The computer was in sleep mode for a while and when I came back there was a new keychain software update, which I then installed and restarted the computer as prompted by the installer. When the computer restarted I magically had no wifi signal anymore so I restarted the computer again (this has worked for me before). I still had nothing when I restarted. I clicked on the blank wifi symbol and it told me I have no airport card installed even though it's been working flawlessly for the last couple of months I've had the computer. I've tried restoring permissions (no idea if that would help anyway) and I unplugged the power from the back of the computer for a couple minutes and turned it back on, but nothing helped. Could the airport card just be toasted or is it possible there is just some sort of software conflict going on now? Like I said, everything was fine until I installed the "login & keychain update 1.0".