One of our readers after installing Ubuntu 10.10 Maverick, had a error during update reporting NO_PUBKEY DB141E2302FDF932. This problem is due authentication of the repository key from Ubuntu Extra PPA, which is released by Launchpad at the time of integration with ubuntu 10.10.
How to fix it?
To resolve this problem, simply run the terminal and type:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys DB141E2302FDF932 sudo apt-get update
After this your system should run fine.