Well the app has an infinite recursion.

This shows on Fedora Linux 17:
"""
Request Method: 	GET
Request URL: 	http://127.0.0.1:8000/
Django Version: 	1.4
Exception Type: 	RuntimeError
Exception Value: 	

maximum recursion depth exceeded while calling a Python object

Exception Location: 	/tmp/dg/django_select2/fields.py in __init__, line 146
Python Executable: 	/home/ross/src/python/2.7/python
Python Version: 	2.7.1
...
"""

Of course, this shouldn't cause a bus error in Python. Perhaps try a different build of Python or try building it yourself?