grappelli_safe is a permanent fork of Grappelli admin skin for Django, to be referenced as a dependency for the Mezzanine CMS for Django.
At the time of grappelli_safe's creation, Grappelli was incorrectly packaged on PyPI, and had also dropped compatibility with Django 1.1 -- grappelli_safe was therefore created to address these specific issues.
For further details, see Why are Grappelli and Filebrowser Forked?.