MozTrap doesn't actually support Django 1.5 yet. We are still on 1.4. This may well be the issue.
Your best bet to install is to create a virtualenv and run bin/install-reqs which will get all the right versions of the python packages.
https://moztrap.readthedocs.org/en/latest/installation.html#quickstartWe will be updating MozTrap to work with Django 1.5 at some point, but I can't say exactly when. I'm working on a few projects at once. So your best bet is to use the existing packages from requirements.txt.
I hope this helps. And thanks for using MozTrap! :)
-Cam