This is a problem in 12.10 that has been driving me nuts, and it's a problem with the wifi. Ubuntu will never connect to the network. All of my other devices work fine.
What will happen is I will type in the password, the authentication window will go away, and the Wifi icon will pulsate for a while. Then about a minute later, a window will pop up asking for authentication to join the same wifi network. If you type in the password again it will do the same thing, and even if you hit [Cancel], the window will still pop back up in another minute. This is a very irritating thing.