FYI, Software Update automatically launched for me tonight revealing "Airport Extreme Driver Update v3.4.2", description of the update as follows: This software update provides improved AirPort Extreme wireless networking software and is recommended for all customers with an AirPort Extreme enabled computer. New AirPort Extreme Features Enhanced networking reliability during certain memory intensive operations. Looks like it may address an issue with Airport Extreme connections with computers using more than 1GB of RAM. Unfortunately I only have 512MB in my 17" PBG4 so I can not verify the fix. I will be applying it shortly anyway. Enjoy.