It is not incorrect. The C strings for ubiquity are in American English, in which the serial comma is entirely acceptable.
** Changed in: ubiquity (Ubuntu) Status: In Progress => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/938885 Title: Incorrect english string in ubiquity-debconf template To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/938885/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs