This has me totally stumped. My brother has an open wireless network set up, and he can join the network and connect to the internet with his ibook running 10.3.9. I can join the network (I get an airport signal, it says I'm connected to the network in my network preferences), but I'm not pulling an IP address from the network, so I can't connect to the internet. As far as I can tell, all of the settings on my ibook (10.4.3) and my brother's are the same. More to the point, how am I able to connect to a network that I can't pull an IP address from? Very confused here! Thanks in advance!