[throwaway7767]

Most likely it's different normalization. I've seen this before with Mac systems.

Renaming the files to use NFKC normalization fixed it. In python, you could loop through the files and do something like:

  os.rename(originalfilename, unicodedata.normalize('NFKC', originalfilename.decode('utf8')))

EDIT: You'll probably need to do this on a non-Mac system, linux for example should work.