Interestingly, I can reproduce this; but when I tried to debug it (by running python3 /usr/lib/software-properties/software-properties-dbus manually from a root shell and watching its output), the bug was no longer reproducible. This pointed to a problem specific to the process environment - and indeed, if I run software-properties-dbus with LANG=C, I get the following error (repeatedly):
WARNING:root:could not open file '/etc/apt/sources.list' This points to a bug in aptsources.sourceslist.SourcesList.load(), which is using the default encoding (ascii) when opening the file for reading. ** Package changed: software-properties (Ubuntu Saucy) => python-apt (Ubuntu Saucy) -- 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