This maybe a coincidence but as soon as I updated my firmware today (7.2.1) on my Airport extreme (have had for about 2months), the basestation is not recognizable through the wireless side by either of my iMacs. I plugged into it via ethernet cable and it picks up the station but then when I unplug, it says can't find base station. I hate this considering that I have had zero problems with it until I updated the firmware. Should have just left a good thing alone. Anyone know what might have happened I would appreciate input.