If you attempt to connect a Mac running Tiger (Mac OS X 10.4.11) to a newer Dual Band Airport Extreme base station, it will likely experience kernel panics. This is a known issue, and the only workaround is to configure the AirPort base station to broadcast both a 2.4 GHz and 5 GHz network, and have Macs running Tiger only connect to the 2.4 GHz network.

To do this, open Airport Utility, choose Manual Setup, select Wireless->Wireless Network Options, check the box for “5 GHz Network Name” and type in a unique name for the 5 GHz network. After updating the base station, newer Macs should connect to the 5 GHz network name, and Macs running Tiger should connect to the 2.4 GHz network name (both will have the same password).