[ubuntu] WPA Key resets

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http://ubuntuforums.org – This one's a bit strange. Intermittently, my wifi disconnects for no apparent reason. When I go to network connections to edit the settings for my local network, the WPA key is awol. If I re-enter the key, and close the "edit connection" window, ubuntu connects right back to the network. I didn't have this problem when I first installed the new wireless-N card a few months ago. Somewhere in one of the updates I must have picked up a bug. Is there anyway to hard program in the wpa passcode? Am I the only one that's experienced this problem. I tried a search but found nothing. Any help would be great. Josch (HowTos)