Hi All, We had an office powercut a few days ago and since then two of our MacBook Airs are unable to connect to the Airport Extreme base station wirelessly. The WiFi is definitely working as several other machines (a mixture of MacBook Pro and Windows 7 Dell's) are able to connect wirelessly to it. The two Airs are able to see the network, but are unable to get an IP address. I've tried re-entering the password, checking the encryption type, renewing the DHCP leases, restarting the base station AND the Airs. Nothing seems to work though. We're using a linux based DHCP server to dish out IP's, and I've tried deleting the leases for the respective MAC addresses and restarting DHCP, but they are still unable to pick up an IP address. Any ideas what to try next? Thanks!