[ubuntu] Wireless not connecting to certain access points

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http://ubuntuforums.org – I've been having a rather strange problem the past few days. I recently downloaded some updates on my ubuntu 12.04 install, and since then, haven't been able to connect to a few networks. I can connect to the majority of networks. However, I CAN'T connect to a few very important ones, including the one in my room at home and the one at the office. With the the ones mentioned above, I can see them in the drop down list of networks in network manager and can even click on them. However, after this, it keeps trying to connect, but fails and asks me for the password repeatedly every minute or (Hardware)