*** This bug is a duplicate of bug 47859 *** Thanks for your report. This looks very much like one of the effects of bug 47859; you should be able to deal with it by rebooting the live CD and then upgrading ubiquity, ubiquity-frontend-gtk, and ubiquity-ubuntu- artwork from the Ubuntu archive before running the installer.
** This bug has been marked a duplicate of bug 47859 crashes if some packages on live fs are unconfigured -- installer crashed https://launchpad.net/bugs/58955 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs