Just use the terminal to overcome this issue, until it is fixed. If you want to install package xyz which is not signed, then just do
sudo apt-get install xyz The software center tells you the name of the packages. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/705988 Title: [master] Untrusted packages can not be installed -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
