You are facing the issue because you had, before the upgrade, a cinnamon version provided by a PPA which conflicts with the way the Ubuntu package is done. Please remove your earlier PPA version before running the upgrade.
** Changed in: cinnamon (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1149023 Title: package cinnamon-common (not installed) failed to install/upgrade: trying to overwrite '/etc/xdg/menus/cinnamon-applications.menu', which is also in package cinnamon 1.6.7-0ubuntu1~quantal1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cinnamon/+bug/1149023/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs