Comment 2 for bug 1258529

Steps to reproduce
===============

1. Install schooltool from universe

  $ sudo apt-get install schooltool

2. It starts. But don't open in the browser (to avoid creating preferences object).

3. Add the ppa

  $ sudo add-apt-repository ppa:schooltool-owners/ppa
  $ sudo apt-get update
  $ sudo apt-get dist-upgrade schooltool

4. New version is installed, but it fails to start.

Workaround
==========

1. Temporarily downgrade to the version from archive:

  $ sudo apt-get install python-schooltool=1:2.6.0-0ubuntu1

2. Server is started. Check it in the browser at http://localhost:7080

3. Upgrade to the version from PPA again

  $ sudo apt-get install python-schooltool

4. It should upgrade successfully and work. See http://localhost:7080