I've found a problem when upgrading to ubuntu 11.10 regarding the network manager
After upgrading the wireless connection didn't work I thought it was a problem relate to the wlagn driver, but then it turns out that it is a problem with root access privliges.
for instance: when running the sotware center from the Golden menu I can't install or remove any software, the same thing for Synaptic, I have to run it from terminal with sudo.
This is not issue we are working with linux.
but then I found the problem is also with network-manager which is annoying.
The network manager can't communicate with wpa_supplicant unless I do it manually with wpa_gui as you will see in this video.
This is very useful when you know that the problem is not with wireless driver, and it is a strange problem, I don't know if it is a bug in ubuntu 11.10 where the unlock key found in other places is not found in the network manager and software center.
I hope someone will have a look at the video on this link