I've been having lots of problems with airport under 10.4.8 intel recently. I tried the suggestion on the apple support page, which was to remove my WPA2 network from the preferred list and to re-add it. I tried trashing airport pref files. Every now and again, airport drops out completely while on, and no available networks are listed from the menu bar, requiring a reset. I know my airport express router is working perfectly, and I know several other networks in the neighborhood are working. They're just not showing up on intel 10.4.8. I have a ppc ibook, and it connects to the router just fine under 10.4.8. When is apple going to acknowledge this problem and create a fix?