Comment 1 for bug 388825

Edge is now running with pytz 2009i. It allows users to set their timezones to values not understood by the production systems (production seems to be using the system installed pytz 2008c linked to the Ubuntu zoneinfo files).

Installing a more modern pytz will work around the issue for now.

We need to consider how we handle package upgrades in the future - buildout now makes it easier to upgrade our dependencies, and every time we do so we risk similar issues occurring due to the version skew between production and edge.