This should be fixed by http://codereview.appspot.com/5684055/ (rietveld
had special-case handling for the GAE local dev server that needed to be
removed)
Comment #4 on issue 6 by albrecht.andi: 401 from upload.py
http://code.google.com/p/django-gae2django/issues/detail?id=6
Fixed in revision d12e804e3618, thanks rick446.RC for the patch!