We simply switched to a new server and dumpdates using this command (modernpolitcs is the name of the application):

python manage.py dumpdata modernpolitics> /dump/backup.json

worked on the old server, but now does not work on the new server (after binding to reinstall all the dependencies).

The error I get is: "Error: cannot serialize the database: get_db_prep_value () takes at least 3 arguments (2 data)"

The bug was fixed and just found a couple of "allowed" tickets for the old django development. Any ideas what might be the problem?

python 2.7.2 django 1.4

I can reset one model, for example. modernpolitics.question .. hmm