I just came across the same issue after I upgraded to 13.10 Saucy from 13.04 Raring and I could no longer change my Software Sources.
Turned out I had a รด hiding in one of the comments in my sources.list. Things worked fine after I changed that to an o without ^. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1069019 Title: [software-properties-gtk] can not delete, enable or modify any software source with non-ASCII characters in the comment To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/1069019/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
