How to make update manager stop nagging about a new release?
- Open Update Manages and click on Settings .
- Go to Updates tab and change 'Show new distribution releases' to never.
In the 'Software Sources' go to 'Updates' tab and set 'Show New Distribution Releases' to 'Never' as shown below. I use Natty but it will be same in Lucid and Maverick too.
You should go to software center --> edit--> software sources
Then on the third tab (updates) go to "release upgrade" (last one) and change it to "never"
edit : what the others said above with glorious images :D