It's the strangest thing, my wife's MBA (v1) will randomly refuse to connect to our home wifi network (cast by a 500GB Time Capsule). What seems to be happening is that it will connect then disconnect at bootup, it will say no preferred networks are available (when the home network has been configured!) and refuse to assign an IP address to the MBA. If I manually select the home network from the wifi icon, it will diplay security password, and then say this is invalid (when it is perfectly valid and the one used by my own MBP and iPhone)... this seems to happen only on our home network, any other works fine... My own MBP is fine. This is driving me crazy and I haven't found anything on the web on this. Please help if you know anything about this...cheers!