[ubuntu] Wireless Stopped Working out of Nowhere

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http://ubuntuforums.org – Hello, I did a fresh install of Ubuntu 11.10 on a Macbook 3.1 today. Everything works fine. All of a sudden, my wireless would pick up connections, but not connect to them. Previously, my wireless worked perfectly, even when I used the Live CD. Other computers connect to the wireless router fine, and even Mac OS X does when I dual boot. Any idea what's causing this and how I can fix it? Your help is greatly appreciated. (Hardware)