No those PPAs are not installed by default. You might have used the redshift repos before upgrading to maverick. When you upgrades your computer to a new version it browses all your subribed PPAS and replace the ubuntu version name. In this case it moves your PPAS form Jaunty to Maverick.
To me this is not a bug, I ll change the bug status to invalid. Regards ** Changed in: update-manager (Ubuntu) Status: New => Invalid -- Missing Redshift PPA for Maverick / Wrong default packages' sources https://bugs.launchpad.net/bugs/636280 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs