I have a 15" PwerBook that I bought in December 2003. Have had a few issues with kernel panics but no other real problems. The other day I got a "semi"-kernel panic which I was able to resolve just by rebooting. However, the airport card seemed to have vanished (not detected). Rebooted again and got it back. But, last night I got the "No airport card detected" message again and I cannot get the computer to detct the card no matter what I do. I have not dropped the machine or had it jostling around - so I do not think it can be a physical problem with the card. I suppose I will have to remove and reinstall the card to be sure, but I very much doubt that is the problem. Has anyone ever heard of this problem arising?