Note that my testing on this was on Server ISO specifically, and Phill's issues were on the Lubuntu Alternate installer (and then traced backwards).
** Summary changed: - [Xenial] 2015-12-25 Server ISO leaves 'deb' line for CDROM uncommented after install + [Xenial] 2015-12-25 ISOs (multiple ones) leave 'deb' line for CDROM uncommented after install -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1529297 Title: [Xenial] 2015-12-25 ISOs (multiple ones) leave 'deb' line for CDROM uncommented after install To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/1529297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs