django-filebrowser for default Django admin site. Based on https://github.com/sehmaschine/django-filebrowser v3.1 (before it was in git) Consider using https://github.com/smacker/django-filebrowser-no-grappelli which is based on a newer version
The last place I saw a message_set (in the delete view) I just removed. Maybe you're running an old version? Try the version in git, or wait for the version I'm releasing shortly.
So I have this error, when I click to filebrowser icon in TinyMCE.I use Django 1.4 and tinyMCE