Comment 7 for bug 213909

So anyone else coming here doesn't have to go digging:
https://bugs.edge.launchpad.net/ubuntu/+source/launchpad-integration/+bug/213863
https://bugs.launchpad.net/ubuntu/+source/launchpad-integration/+bug/213896

Fix: https://bugs.edge.launchpad.net/ubuntu/+source/launchpad-integration/+bug/213863/comments/2

"Confirmed. A possible workaround should be the following:
1. Download http://archive.ubuntu.com/ubuntu/pool/main/l/launchpad-integration/liblaunchpad-integration1_0.1.18_i386.deb
2. Install this package manually with the following commands: sudo dpkg --force-overwrite -i liblaunchpad-integration1_0.1.18_i386.deb
3. sudo apt-get -f install or sudo apt-get upgrade

Regards
Matthias"

^^ That worked for me.