The script below produces 1664 lines of output before it bails out with
Traceback (most recent call last):
  File "WalkBug.py", line 5, in <module>
for Dir, SubDirs, Files in os.walk('/home/jarausch') :
  File "/usr/local/lib/python3.0/os.py", line 278, in walk
for x in walk(path, topdown, onerror, followlinks):
  File "/usr/local/lib/python3.0/os.py", line 268, in walk
if isdir(join(top, name)):
  File "/usr/local/lib/python3.0/posixpath.py", line 64, in join
if b.startswith('/'):
TypeError: expected an object with the buffer interface

=========================
file  WalkBug.py:

#!/usr/local/bin/python3.0

import os

for Dir, SubDirs, Files in os.walk('/home/jarausch') :
  print("processing {0:d} files in {1}".format(len(Files),Dir))