Several times a day now, I look up and notice that I am no longer connected to my airport express wireless. I have good signal (>75% always), but for no reason, I suddenly have to choose it out of the airport menu again. Sometimes, it's not even listed, and I have to turn airport off and back on. Is there some sort of log or something I can look at? There is another weak wireless network in the area. I kind of think this Mac decides to connect to that one, but then looses it. This Mac also does not seem to automatically join the Ae's network. I've tried setting the Network syspref to autojoin it, but that makes no difference. Idears?