UnicodeDecodeError when there is non-ascii characters in path to files

[tiktuk]

python podcats.py serve --host tiktuk.net --port 5001 ~/Æblegrød

gives the following error when I press play in my podcast player:

Traceback (most recent call last):
  File "/home/tuk/.virtualenvs/podcats/lib/python2.7/site-packages/flask/app.py", line 1997, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/tuk/.virtualenvs/podcats/lib/python2.7/site-packages/flask/app.py", line 1985, in wsgi_app
    response = self.handle_exception(e)
  File "/home/tuk/.virtualenvs/podcats/lib/python2.7/site-packages/flask/app.py", line 1540, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/home/tuk/.virtualenvs/podcats/lib/python2.7/site-packages/flask/app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/tuk/.virtualenvs/podcats/lib/python2.7/site-packages/flask/app.py", line 1614, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/tuk/.virtualenvs/podcats/lib/python2.7/site-packages/flask/app.py", line 1517, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/tuk/.virtualenvs/podcats/lib/python2.7/site-packages/flask/app.py", line 1612, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/tuk/.virtualenvs/podcats/lib/python2.7/site-packages/flask/app.py", line 1598, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/tuk/.virtualenvs/podcats/lib/python2.7/site-packages/flask/helpers.py", line 928, in send_static_file
    cache_timeout=cache_timeout)
  File "/home/tuk/.virtualenvs/podcats/lib/python2.7/site-packages/flask/helpers.py", line 669, in send_from_directory
    filename = safe_join(directory, filename)
  File "/home/tuk/.virtualenvs/podcats/lib/python2.7/site-packages/flask/helpers.py", line 639, in safe_join
    return posixpath.join(*parts)
  File "/usr/lib/python2.7/posixpath.py", line 71, in join
    path +=  b
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 14: ordinal not in range(128)