As a workaround, you can enter /etc/apt/sources.list.d and edit with your favorite editor the *.list files uncommenting (removing leading #) those which you wish to restore.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1162469 Title: After upgrade to 13.04, changing the software repositories is impossible To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1162469/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs