Security update broke my WiFi

Just installed the latest security update (2008-6) via software update (on my iBook) and now I can't access my WiFi. My network is visible but then I try and connect I get the message that the password is incorrect. I've re-entered the password using Internet Connect then it tells me there's an error connecting to the network. The password in the keychain is correct. I've tried to create a new 802.1X connection from Internet Connect but this option is grayed out.
Please help
Many thanks

I had the same problem on my iMac G5 this morning. I was able to fix it using some advice in a discussion thread "Network Preference Pane Gone Berserk after Latest Security Update (Tiger)" from tonza. There is a message posted Sept 20 at 2:05 AM that recommends removing some preference files and recreating the network configuration. That worked for me and my WiFi came back immediately. I didn't have all of the problems discussed in this thread. You probably ought to read some of the other messages to convince yourself that this is the problem that you are seeing.
I had a recent backup that I could boot off of or I would have never found this. Make a backup first!
Good luck!!

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