No wireless connection after last Airport update

My MB is no longer able to use Airport after update yesterday. Tried everything, like hard shut down, safe boot, new network in stalled,..... nothing helped!
Please, if any other ideas.... HELP ME OUT!

I have exactly the same issue and symptoms. I applied the update, rebooted, and landed in wireless limbo. Yes, if I remove encryption from my wireless router, the MacBook then works. Yes, my other Mac on my net (and my Linux and Windows boxes and my Nokia 770) all work just fine with the 128 bit WEP.
Why doesn't Apple have a mechanism for rolling back patches, like I can do with Linux! Oh yes, testing would be good idea too.
Question - has anybody tried entering the WEP key in HEX?
Question2 - anybody have a "friend" inside Apple?
I have been through a lot of postings and apparently this problem is a regression and crops up again and again in new versions/patches to MacOS.
MacBook   Mac OS X (10.4.8)   1 GB RAM

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