I was unable to recreate this bug report with software-center version 3.1.6. Could you please test this again with that version?
8:06:03 - flash:[...s/main/launchpadlib-scripts] apt-cache policy aptdaemon aptdaemon: Installed: 0.40+bzr529-0ubuntu1 Candidate: 0.40+bzr529-0ubuntu1 Version table: *** 0.40+bzr529-0ubuntu1 0 500 http://archive.ubuntu.com/ubuntu/ natty/main amd64 Packages 100 /var/lib/dpkg/status 8:06:11 - flash:[...s/main/launchpadlib-scripts] apt-cache policy software-center software-center: Installed: 3.1.6 Candidate: 3.1.6 Version table: *** 3.1.6 0 500 http://archive.ubuntu.com/ubuntu/ natty/main amd64 Packages 100 /var/lib/dpkg/status ** Changed in: software-center (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/689997 Title: SC silently fails to start: softwarecenter.backend - ERROR - aptdaemon import failed -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs