I've posted this to the Apple forums, but haven't gotten any response. I have a AirPort Extreme base station, with WPA enabled. Occasionally my connection drops, and my Mac does one of 3 things: It shows the AirPort network (as well as my neighbor's), but when I select it it says "There was an error joining network AirPort" It shows no available networks; It will reconnect (rarely). It's not my Mac - Apple replaced it for me (PowerBook 17 Rev B). I am running OS X 10.3.3, with the latest AirPort software and firmware. It also did this when I had an 802.11g Netgear router. Has any one else experienced this, and can offer advice? Thanks.