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Oh Jeez.... so many folks with wireless troubles. And I've been in la-la land ever since iChanged. Actually, this was the first thing that I saw the first time I started my Macbook Pro (on Snow Leopard), and all was done only with a click on 'Yes".
I was expecting the Windows style hodge-podge setting up a connection, but this was surprisingly smooth, and has been running so ever since. Well.. 'since' has been 2 days, so to speak.
 
i just got a new macbook and latest leopard and have been having very bizarre wireless issues that i think fall into the same category as is being discussed here:
the wireless does not seem to hold the connection and keeps searching every few minutes - that being said it only seems to be a problem in one area : i am currently in my backyard where the wireless i share with the neighbours above is working fine, the old computer that is on its last legs (mac 2002) still works in the apartment and the new computer works everywhere else... we've rebooted, changed passwords, removed passwords.... but doesn't make any logical sense...
i know this isn't an answer but it seems similar trouble to what i'm reading here

My macbook wasn't holding the connection either. I tried everything, and the one thing that fixed it was this: switch your router's wireless security from WEP to either WPA or WPA2. Once I did this, the connection was rock solid and has been ever since.
 
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