Commenting out or removing the PPA should solve the issue. This is the one causing the problem "http://ppa.launchpad.net/ricotz/testing/ubuntu/ natty/main amd64 ". Just curious, what version of ubuntu are you running? You can find out with the command:
lsb_release -drc --- Ubuntu Bug Squad volunteer triager http://wiki.ubuntu.com/BugSquad -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/902860 Title: Could not calculate the upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/902860/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
