I've had my 24" iMac working this morning on my Netgear router, but it now refuses to get an IP address and just keeps getting the default one of 169.something instead of one from the DHCP pool. This is a new iMac, everything has been updated and the wireless card has previously worked today in both OS X and Windows via boot camp. I have an iBook and a Windows laptop also on the connection currently, so I'm a bit confused as to what has happened. I've found a thread from before on here and have checked the obvious things, but no joy. I've manually assigned the Mac an IP address, but when I ping the router, it says "host is down", which it clearly isn't. Any ideas? This is driving me mad..... Thanks, Mike.