UnicodeDecodeError on id parameter

[nstarke]

Attempting to access a URL with an ID parameter, such as:

/accounts/%FF/
/geoq/api/job/%FF
/geoq/projects/%FF
/maps/layers/update/%FF
/maps/feature-types/update/%FF
(etc)

results in a 500 Server error: UnicodeDecodeError. This is true for unicode values greater than and including 96 (%80).

Full Stack Trace:

Traceback (most recent call last):
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 85, in run
    self.result = application(self.environ, self.start_response)
  File "~/pyenv/geoq/local/lib/python2.7/site-packages/django/contrib/staticfiles/handlers.py", line 71, in __call__
    if not self._should_handle(get_path_info(environ)):
  File "~/pyenv/geoq/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 247, in get_path_info
    return path_info.decode('utf-8')
  File "~/pyenv/geoq/lib/python2.7/encodings/utf_8.py", line 16, in decode
    return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xff in position 10: invalid start byte
[11/Jun/2015 20:26:34] "GET /accounts/%FF/ HTTP/1.1" 500 59

I do not believe this represents a security vulnerability.