error with Python3 - inconsistent use of tabs and spaces in indentation

I'm trying to run the example with the following environment:

 - Python 3.3.1
 - Ladon 0.8.2
 - Ladon Examples 0.6.3

I get a tracedump with a TabError: inconsistent use of tabs and spaces in indentation

Here is the full dump:

python3 runserver.py
Traceback (most recent call last):
  File "runserver.py", line 2, in <module>
    from ladon.server.wsgi import LadonWSGIApplication
  File "/usr/local/lib/python3.3/dist-packages/ladon-0.8.2-py3.3.egg/ladon/server/wsgi.py", line 1, in <module>
    import ladon.server.wsgi_application as wsgi_application
  File "/usr/local/lib/python3.3/dist-packages/ladon-0.8.2-py3.3.egg/ladon/server/wsgi_application.py", line 9, in <module>
    from ladon.ladonizer.collection import global_service_collection
  File "/usr/local/lib/python3.3/dist-packages/ladon-0.8.2-py3.3.egg/ladon/ladonizer/__init__.py", line 1, in <module>
    import ladon.ladonizer.decorator
  File "/usr/local/lib/python3.3/dist-packages/ladon-0.8.2-py3.3.egg/ladon/ladonizer/decorator.py", line 12, in <module>
    from ladon.ladonizer.collection import global_service_collection
  File "/usr/local/lib/python3.3/dist-packages/ladon-0.8.2-py3.3.egg/ladon/ladonizer/collection.py", line 4, in <module>
    import ladon.interfaces as interfaces
  File "/usr/local/lib/python3.3/dist-packages/ladon-0.8.2-py3.3.egg/ladon/interfaces/__init__.py", line 71, in <module>
    import ladon.interfaces.soap
  File "/usr/local/lib/python3.3/dist-packages/ladon-0.8.2-py3.3.egg/ladon/interfaces/soap.py", line 681
    item_element.setAttribute('xmlns', 'http://schemas.microsoft.com/2003/10/Serialization/Arrays')
                                                                                                  ^
TabError: inconsistent use of tabs and spaces in indentation