Supervisor always quit process with ‘exit status 0; not expected’

I'm currently rebuilding my vps, and I'd like to use supervisor for managing my gunicorn/wsgi django processes. Thing is, supervisor keeps exiting the processes:

2010-07-23 14:54:40,575 INFO supervisord started with pid 31391
2010-07-23 14:54:41,582 INFO spawned: 'projectx' with pid 31395
2010-07-23 14:54:41,691 INFO exited: projectx (exit status 0; not expected)
2010-07-23 14:54:42,695 INFO spawned: 'projectx' with pid 31401
2010-07-23 14:54:42,801 INFO exited: projectx (exit status 0; not expected)
2010-07-23 14:54:44,806 INFO spawned: 'projectx' with pid 31404
2010-07-23 14:54:44,912 INFO exited: projectx (exit status 0; not expected)
2010-07-23 14:54:47,917 INFO spawned: 'projectx' with pid 31408
2010-07-23 14:54:48,022 INFO exited: projectx (exit status 0; not expected)
2010-07-23 14:54:49,023 INFO gave up: projectx entered FATAL state, too many start retries too quickly

This is the config I'm using:

[program:projectx]
command=/path/to/project/bin/gunicorn_django -c /path/to/project/project/gunicorn.conf.py /path/to/project/project/production.py
user=myuser
autostart=true
autorestart=true

I already double checked, and gunicorn_django does return status 0 when it's spawned correctly.

I tried adding exitcodes=0,2 explicitly to the config, but that doesn't seem to make a difference either. It looks like the process is spawned correctly, but supervisor thinks it didn't.