Default behavior: what's your choice?

[RedRise]

lm.py has a pb when some filename or dirname are not encoded with the default file system encoding. Please see a concrete case here.

One option, to allow lm to run smoothly is to avoid wrongly encoded files or directories (maybe with a warning message, asking to renames them).

What do you think?

[RedRise]

I currently implemented to silently ignore filenames not encoded in default filesystem encoding.
Those files can be seen when addin --debug parameter as WARNING