I belive that Something is wrong with your sources.Try new sources. Rename existing sources.list file and create new.
1) Open a Terminal and enter the following commands: cd /etc/apt sudo mv sources.list sources.list.bak 2 )Press Alt+F2 and type this command: gksu gedit /etc/apt/sources.list and add these sources: deb http://archive.ubuntu.com/ubuntu karmic main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu karmic-updates main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu karmic-security main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu karmic-proposed main restricted universe multiverse Afterwards,You save this file and open update-manager again. sudo aptitude update -- update-manager crashes on startup https://bugs.launchpad.net/bugs/472635 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
