This is occurs rather regularly for users of Ubuntu 12.04 and Ubuntu 12.10 as we can see at:
https://errors.ubuntu.com/bucket/?id=%2Fusr%2Fbin%2Fsession- installer%3AAlreadyCalledDeferred%3A_on_finished%3Acallback ** Changed in: sessioninstaller (Ubuntu) Importance: Medium => High ** Changed in: sessioninstaller (Ubuntu) Status: Confirmed => Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1056545 Title: session-installer crashed with AlreadyCalledDeferred in callback() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sessioninstaller/+bug/1056545/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs