OK, so I've been having a ton of problems with 7.4.1 - after much testing, the major one appears to be loss of the beacon after sleep in 802.11n only mode. Because of this I had downgraded back to 7.3.2 (and once again returned to perfect functionality). I figured I'd give this another try after 10.5.7 - after all, my fiancee's HP laptop has no problem finding the network. Installed 10.5.7, and updated to firmware 7.4.1. Still had the same problem - worked perfectly until I slept my macbook. Then, couldn't find the network. After that, I did a hard reset and factory default on the AEBS. Also rebooted my macbook. Went through the AEBS setup again and voila! - now finds the network after waking from sleep. I think there's some sort of weird conflict or variable that doesn't get set properly after the firmware update that the hard reset to factory defaults fixes. I'll try it for the next few days and see if it fixes the problem permanently.