Hi I've been using my iMac (Airport Extreme card installed) as a software base station to provide wireless internet access to my wife on her iBook (Airport card installed). My iMac is connected to the internet through a DSL modem which is configured as the DHCP server. We have both been running 10.2, and there has been no problem. Last night I upgraded the iMac to 10.3 and my wife can nolonger access the internet over Airport. The airport network is available and the iBook can access the network no problem, but the iBook can not connect to the internet. I checked the network status on the iMac and it shows a green light for "built in ethernet", but an orange light for "Airport" saying that airport does not have an IP address and cannot access the internet. The iMac can access the internet no problem, and I have checked and double-checked that the Internet Sharing is turned on. Is this a compatibility issue with the DSL modem or something I can fix by configuring Airport properly. Thoughts anyone? Cheers.